Welcome to the Purdue OWL
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Note for Purdue Students: Schedule a consultation at the on-campus writing lab to get more in-depth writing help from one of our tutors.
General Format
Note: This page reflects the latest version of the APA Publication Manual (i.e., APA 7), which released in October 2019. The equivalent resource for the older APA 6 style can be found here.
Please use the example at the bottom of this page to cite the Purdue OWL in APA.
You can also watch our APA vidcast series on the Purdue OWL YouTube Channel.
Note: For more information about services for the Purdue University community, including one-to-one consultations, ESL conversation groups and workshops, please visit the Writing Lab site.![]()
General APA Guidelines
Your essay should be typed and double-spaced on standard-sized paper (8.5" x 11"), with 1" margins on all sides. Include a page header (also known as the “running head”) at the top of every page. For a professional paper, this includes your paper title and the page number. For a student paper, this only includes the page number. To create a page header/running head, insert page numbers flush right. Then type "TITLE OF YOUR PAPER" in the header flush left using all capital letters. The running head is a shortened version of your paper's title and cannot exceed 50 characters including spacing and punctuation.
Font
The 7th edition of the APA Publication Manual requires that the chosen font be accessible (i.e., legible) to all readers and that it be used consistently throughout the paper. It acknowledges that many font choices are legitimate, and it advises writers to check with their publishers, instructors, or institutions for guidance in cases of uncertainty.
While the APA Manual does not specify a single font or set of fonts for professional writing, it does recommend a few fonts that are widely available. These include sans serif fonts such as 11-point Calibri, 11-point Arial, and 10-point Lucida Sans Unicode as well as serif fonts such as 12-point Times New Roman, 11-point Georgia, 10-point Computer Modern.
Major Paper Sections
Your essay should include four major sections: the Title Page, Abstract, Main Body, and References.
Title Page
Note: APA 7 provides slightly different directions for formatting the title pages of professional papers (e.g., those intended for scholarly publication) and student papers (e.g., those turned in for credit in a high school or college course).
The title page should contain the title of the paper, the author's name, and the institutional affiliation. A professional paper should also include the author note. A student paper should also include the course number and name, instructor name, and assignment due date.
Type your title in upper and lowercase letters centered in the upper half of the page. The title should be centered and written in boldface. APA recommends that your title be focused and succinct and that it should not contain abbreviations or words that serve no purpose. Your title may take up one or two lines. All text on the title page, and throughout your paper, should be double-spaced.
Beneath the title, type the author's name: first name, middle initial(s), and last name. Do not use titles (Dr.) or degrees (PhD).
Beneath the author's name, type the institutional affiliation, which should indicate the location where the author(s) conducted the research.
A professional paper should include the author note beneath the institutional affiliation, in the bottom half of the title page. This should be divided up into several paragraphs, with any paragraphs that are not relevant omitted. The first paragraph should include the author’s name, the symbol for the ORCID iD, and the URL for the ORCID iD. Any authors who do not have an ORCID iD should be omitted. The second paragraph should show any change in affiliation or any deaths of the authors. The third paragraph should include any disclosures or acknowledgements, such as study registration, open practices and data sharing, disclosure of related reports and conflicts of interest, and acknowledgement of financial support and other assistance. The fourth paragraph should include contact information for the corresponding author.
A student paper should not include an author note.
Note again that page headers/page numbers (described above for professional and student papers) also appear at the top of the title page. In other words, a professional paper's title page will include the title of the paper flush left in all capitals and the page number flush right, while a student paper will only contain the page number flush right.
Student APA title page
Title page for a student paper in APA 7 style.
Professional paper APA title page
Title page for a professional paper in APA 7 style.
Abstract
Begin a new page. Your abstract page should already include the page header (described above). On the first line of the abstract page, center and bold the word “Abstract” (no italics, underlining, or quotation marks).
Beginning with the next line, write a concise summary of the key points of your research. (Do not indent.) Your abstract should contain at least your research topic, research questions, participants, methods, results, data analysis, and conclusions. You may also include possible implications of your research and future work you see connected with your findings. Your abstract should be a single paragraph, double-spaced. Your abstract should typically be no more than 250 words.
You may also want to list keywords from your paper in your abstract. To do this, indent as you would if you were starting a new paragraph, type Keywords: (italicized), and then list your keywords. Listing your keywords will help researchers find your work in databases.
Abstracts are common in scholarly journal articles and are not typically required for student papers unless advised by an instructor. If you are unsure whether or not your work requires an abstract, consult your instructor for further guidance.
APA Abstract Page
Abstract page for a student paper in APA 7 style.
Please see our Sample APA Paper resource to see an example of an APA paper. You may also visit our Additional Resources page for more examples of APA papers.
How to Cite the Purdue OWL in APA
Individual Resources
The page template for the new OWL site does not include contributors' names or the page's last edited date. However, select pages still include this information.
In the absence of contributor/edit date information, treat the page as a source with a group author and use the abbreviation "n.d." for "no date":
Purdue Online Writing Lab. (n.d.). Title of resource. Purdue Online Writing Lab. http://Web address for OWL resource
Purdue Online Writing Lab. (n.d.). General Writing FAQs. Purdue Online Writing Lab. https://owl.purdue.edu/owl/general_writing/general_writing_faqs.html
The generic APA citation for OWL pages, which includes author/edit date information, is this:
Contributors' names. (Last edited date). Title of resource. Site Name. http://Web address for OWL resource
- Navigation
- Purdue OWL
- General Writing
- General Writing Introduction
- Writing Style
- The Writing Process
- The Writing Process Introduction
- Writing Task Resource List: What Do You Need To Write?
- Invention: Starting the Writing Process
- Prewriting (Invention)
- Organization & the CARS Model
- Writer's Block
- Stasis Theory
- Creating a Thesis Statement, Thesis Statement Tips
- Developing an Outline
- Reverse Outlining
- Proofreading
- Time Management: Conquering Long Assignments
- Writing with Feedback
- Academic Writing
- Academic Writing Introduction
- The Rhetorical Situation
- Establishing Arguments
- Logic in Argumentative Writing
- Historical Perspectives on Argumentation
- Paragraphs and Paragraphing
- Essay Writing
- Conciseness
- Paramedic Method
- Reverse Paramedic Method
- Adding Emphasis
- Sentence Variety
- Using Appropriate Language
- Active and Passive Voice
- Email Etiquette
- Email Etiquette for Students
- Using Foreign Languages in Academic Writing in English
- Public Speaking and Presentations
- Learning from Lectures
- Common Writing Assignments
- Common Writing Assignments Introduction
- Understanding Writing Assignments
- Argument Papers
- Research Papers
- Research Posters
- Exploratory Papers
- Annotated Bibliographies
- Book Reports
- Definitions
- Essays for Exams
- Book Reviews
- Mechanics
- Mechanics Introduction
- Higher, Lower Order Concerns
- Sentence Clarity
- Parts of Speech Overview
- Sentence Clarity Presentation
- Sentence Fragments
- Transitions and Transitional Devices
- Dangling Modifiers and How To Correct Them
- Parallel Structure
- Two-Part (Phrasal) Verbs (Idioms)
- Capitals: Help with Capitals
- Gerunds, Participles, and Infinitives
- Grammar
- Grammar Introduction
- Spelling: Common Words that Sound Alike
- Numbers: Writing Numbers
- Adjective or Adverb
- How to Use Adjectives and Adverbs
- Appositives
- Articles: A versus An
- How to Use Articles (a/an/the)
- Prepositions
- Pronouns
- Relative Pronouns
- Count and Noncount Nouns
- Subject/Verb Agreement
- Verb Tenses
- Active Verb Tenses
- Irregular Verbs
- That vs. Which
- Punctuation
- Punctuation Introduction
- Punctuation
- Sentence Punctuation Patterns
- Independent and Dependent Clauses
- Conquering the Comma Presentation
- Commas
- Apostrophe Introduction
- Hyphen Use
- Quotation Marks
- Visual Rhetoric
- Visual Rhetoric Introduction
- Visual Rhetoric
- Analyzing Visual Documents
- Using Fonts with Purpose
- Color Theory Presentation
- Designing Effective PowerPoint Presentations
- Data Visualization
- Undergraduate Applications
- Undergraduate Applications Introduction
- Advice from Undergraduate Admissions Officers
- Undergraduate Application Timeline and Additional Resources
- Graduate School Applications
- Graduate School Applications Introduction
- Overview
- Researching Programs
- Statements of Purpose
- Requesting Recommendation Letters
- Writing a Research Statement
- Personal Correspondence
- Community Engaged Writing
- Media File Index
- General Writing FAQs
- Research and Citation
- Research and Citation Resources
- Conducting Research
- Conducting Research Introduction
- Research Overview
- Conducting Primary Research
- Evaluating Sources of Information
- Searching Online
- Internet References
- Archival Research
- Writing a Literature Review
- Using Research
- Using Research Introduction
- Quoting, Paraphrasing, and Summarizing
- Paraphrase Exercises
- Writing with Statistics
- Strategies for Fair Use
- Writing Scientific Abstracts Presentation
- Resources for Documenting Sources in the Disciplines
- APA Style (7th Edition)
- APA Style Introduction
- APA Overview and Workshop
- APA Formatting and Style Guide (7th Edition)
- General Format
- In-Text Citations: The Basics
- In-Text Citations: Author/Authors
- Reference List: Basic Rules
- Reference List: Author/Authors
- Reference List: Articles in Periodicals
- Reference List: Books
- Reference List: Other Print Sources
- Reference List: Electronic Sources
- Reference List: Audiovisual Media
- Reference List: Other Non-Print Sources
- APA Legal References
- Footnotes & Appendices
- Numbers and Statistics
- Additional Resources
- APA Headings and Seriation
- APA PowerPoint Slide Presentation
- APA Sample Paper
- APA Tables and Figures
- APA Classroom Poster
- Changes in the 7th Edition
- General APA FAQs
- MLA Style
- MLA Style Introduction
- MLA Overview and Workshop
- MLA Formatting and Style Guide
- General Format
- MLA Formatting and Style Guide
- MLA In-Text Citations: The Basics
- MLA Formatting Lists
- MLA Formatting Quotations
- MLA Endnotes and Footnotes
- MLA Works Cited Page: Basic Format
- MLA Works Cited Page: Books
- MLA Works Cited Page: Periodicals
- MLA Works Cited: Electronic Sources
- MLA Works Cited: Other Common Sources
- MLA Additional Resources
- MLA Abbreviations
- MLA Sample Works Cited Page
- MLA Sample Paper
- MLA Tables, Figures, and Examples
- MLA PowerPoint Presentation
- MLA FAQs
- MLA Classroom Poster
- MLA 9th Edition Changes
- MLA 8th Edition Changes
- Chicago Style
- CMOS Introduction
- CMOS Overview and Workshop
- CMOS Formatting and Style Guide
- Chicago Manual of Style 17th Edition
- General Format
- Books
- Periodicals
- Web Sources
- Audiovisual Recordings and Other Multimedia
- Interviews, Personal Communication
- Legal, Public and Unpublished Materials
- Bluebook Citation for Legal Materials
- Miscellaneous Sources
- CMOS Author Date Sample Paper
- CMOS NB Sample Paper
- CMOS NB PowerPoint Presentation
- CMOS Author Date PowerPoint Presentation
- CMOS Author Date Classroom Poster
- CMOS NB Classroom Poster
- IEEE Style
- AMA Style
- ASA Style
- APA Style (6th Edition)
- APA Style Introduction
- APA Overview and Workshop
- APA Formatting and Style Guide (6th Edition)
- General Format
- In-Text Citations: The Basics
- In-Text Citations: Author/Authors
- Footnotes and Endnotes
- Reference List: Basic Rules
- Reference List: Author/Authors
- Reference List: Articles in Periodicals
- Reference List: Books
- Reference List: Other Print Sources
- Reference List: Electronic Sources
- Reference List: Other Non-Print Sources
- Additional Resources
- Types of APA Papers
- APA Stylistics: Avoiding Bias
- APA Stylistics: Basics
- APA Headings and Seriation
- APA PowerPoint Slide Presentation
- APA Sample Paper
- APA Tables and Figures 1
- APA Tables and Figures 2
- APA Abbreviations
- Numbers in APA
- Statistics in APA
- APA Classroom Poster
- APA Changes 6th Edition
- General APA FAQs
- Using Citation Generators Responsibly
- Using Paper Checkers Responsibly
- Style Manual Glossary
- Avoiding Plagiarism
- Teacher and Tutor Resources
- Writing Instructors
- Writing Instructors Introduction
- Parents
- Grades 7-12 Instructors and Students
- Non-Purdue Users
- Purdue Instructors and Students
- Adult Basic Education
- Writing Across the Curriculum: An Introduction
- Creative Nonfiction in Writing Courses
- Poetry in Writing Courses
- Teaching Detailed Writing and Procedural Transitions
- Teaching OSDDP: A Guide for Professional Writing Instructors
- Email Etiquette for Professors
- Writing Letters of Recommendation for Students
- Writing Tutors
- Writing Tutors Introduction
- Meeting One-on-One with Students
- Tutoring a Résumé
- Tutoring Cover Letters
- Tutoring Creative Writing Students
- Tutoring Lab Reports
- Tutoring Grammar
- Tutoring Deaf Clients
- Teaching Resources
- Teaching Resources
- Remote Teaching Resources
- Remote Teaching Resource Portal
- Technology in the Writing Classroom
- Adapting Projects to Online Classrooms
- Sharing and Presenting Work in Remote Classrooms
- Teleconferencing in the Writing Classroom
- Cloud-Based Platforms in the Writing Classroom
- Remote Peer Review Strategies
- Writing Prompts for Analyzing Nonfiction
- Nonfiction Analysis Framework
- Writing Prompts for Analyzing Fiction
- Activities for Remote Creative Writing Classrooms
- Discussion Forum Practices for Creative Writing Classes
- Conducting an Interview Presentation
- Writing Process Presentation
- Organizing Your Argument Presentation
- Peer Review Presentation
- Visual Rhetoric Slide Presentation
- Writing a Literary Analysis Presentation
- Effective Persuasion Presentation
- Teaching and Assessing Grammar
- Analytical Research Project Presentation
- OWL Video Offerings for Instructors
- Conducting an Interview Presentation
- Job Acceptance Letter Presentation
- Invention Presentation
- Preventing Plagiarism
- Preventing Plagiarism Introduction
- Contextualizing Plagiarism
- Contextualizing Plagiarism
- Truth or Consequences
- Handout: Truth or Consequences
- The Big Picture
- Authorship and Popular Plagiarism
- Copyright and Plagiarism
- Handout: Copyright and Plagiarism
- Collaborative Authorship
- Handout: Collaborative Authorship
- Defining Our Terms
- Class Plagiarism Policy
- Comparing Policies
- Handout: Comparing Policies
- Avoiding Plagiarism
- Avoiding Plagiarism
- Summarizing, Paraphrasing, and Quoting
- Peer Summarizing
- Anonymous Paraphrasing
- Paraphrasing from Media
- Handout: Paraphrasing from Media
- Using In-text Citations
- Handout: Using In-text Citations
- Quoting Others
- Handout: Quoting Others
- Summary, Paraphrase, and Quotation in Context
- Handout: Summary, Paraphrase, and Quotation in Context
- Translingual Writing
- Writing in the Engineering Classroom
- Why Include Writing in Engineering Courses?
- Using Bloom’s Taxonomy
- Types of Writing Assignments for Engineering Courses
- Conceptual Writing Prompts
- Explain-a-Problem Writing Prompts
- How Stuff Works Writing Prompts
- Real-World Example Writing Prompts
- Design-a-Problem Writing Prompts
- Open-Ended Design Writing Prompts
- Writing Tips for Students
- Assessment and Feedback of Engineering Writing
- Research Team
- OWL Presentation Mode
- Writing Instructors
- Graduate Writing
- Introduction to Graduate Writing
- Graduate Writing Topics
- Graduate Writing Genres
- Thesis & Dissertation
- Subject-Specific Writing
- Professional, Technical Writing
- Professional, Technical Writing Introduction
- Workplace Writers
- Effective Workplace Writing
- Audience Analysis
- Prioritizing Your Concerns for Effective Business Writing
- Parallel Structure
- Activity and Postmortem Reports
- Tone in Business Writing
- HATS: A Design Procedure for Routine Business Documents
- Basic Business Letters
- Accentuating the Positives
- Memos
- Four Point Action Closing
- Grant Writing
- Donation Request Letters
- Technical Reports & Report Abstracts
- White Papers
- Revision in Business Writing
- Business Writing for Administrative and Clerical Staff
- Writing in Literature
- Writing in Literature Introduction
- Writing About Film
- Literary Terms
- Writing About Fiction
- Writing About Literature
- Writing in Literature (Detailed Discussion)
- Writing About Poetry
- Writing about World Literature
- Writing in the Social Sciences
- Writing in the Social Sciences Introduction
- Social Work Literature Review Guidelines
- Writing in Psychology: Experimental Report Writing
- Writing in Engineering
- Engineering Project Documentation
- Writing in Engineering Introduction
- Writing Engineering Reports
- Handbook on Report Formats
- Engineering Projects in Community Service (EPICS)
- INDOT Workshop Resources for Engineers
- Introduction
- Readability Presentation
- Readability Handout
- Paramedic Method Presentation
- Paramedic Method Handout
- Adjectives Presentation
- Adjectives Handout
- Intra-Paragraph Organization Presentation
- Intra-Paragraph Organization Handout
- Verb Use Presentation
- Verb Use Handout
- Macro Level Cohesion Presentation
- Macro Level Cohesion Handout
- Micro Level Cohesion Presentation
- Micro Level Cohesion Handout
- Concise Language Presentation
- Eliminating Unnecessary Words Handout
- Parallelism Handout
- Document Design Presentation
- Poster Design Handout
- Group Work Presentation
- Group Work Handout
- Writing Proposals Handout
- Annotated Sample Documents
- Mechanical Engineering Writing Enhancement Program
- Creative Writing
- Creative Writing Introduction
- Fiction Writing Basics
- Pattern and Variation in Poetry
- Pattern and Variation: Aural
- Pattern and Variation: Visual
- Characters and Fiction Writing
- Poetry Writing
- Creative Nonfiction
- Professional Resources for Creative Writers
- Healthcare Writing
- Healthcare Writing Introduction
- Medical Journalism
- SOAP Notes
- Patient Education Materials
- Writing as a Veterinary Technician
- Writing as a Veterinary Technician
- Patient Signalment, Client Information
- History, Presenting Chief Complaint
- Current Health Status, History
- Past, Birth, and Referral History
- Patient Assessment
- Technician Evaluation
- Interventions
- Rationale for Interventions
- Continued Patient Reassessment
- Desired Resolutions
- Progress Notes
- Discharge Planning
- Legal Issues of Documentation
- Sample Care Plan Example
- Writing as a Professional Nurse
- Journalism and Journalistic Writing
- Writing in the Purdue SURF Program
- Writing in the Purdue SURF Program Introduction
- SURF Workshop Resources Introduction
- SURF Workshop Resources: Problem Statements
- SURF Workshop Resources: Designing Scientific Research Posters
- Submitting an Undergraduate Journal Article
- Writing in Art History
- Professional, Technical Writing
- Job Search Writing
- Preparing an Application
- Writing Statements of Teaching Philosophy
- Preparing an Application Introduction
- Tailoring Employment Documents For a Specific Audience
- Tips and Terms
- Writing the Personal Statement
- Job Skills Checklist
- Action Verbs to Describe Skills, Jobs, and Accomplishments in Employment Documents
- Example Employment Documents
- Job Search Letters
- Job Search Letters Introduction
- Letters Concerning Employment
- Model Letters for Various Purposes
- Cover Letters 1: Quick Tips
- Cover Letters 2: Preparing to Write a Cover Letter
- Cover Letters 3: Writing Your Cover Letter
- Cover Letters Workshop
- Academic Cover Letters
- Résumés and CVs
- Résumés and CVs Introduction
- Introduction
- Résumé Sections
- Using Two Pages or More
- Scannable Résumés
- Résumé Design
- Scannable Résumés Presentation
- Management Résumés
- Résumé Workshop
- Reference Sheets
- Writing the Curriculum Vitae
- Sample Résumés
- Résumés for Military Veterans
- Video Résumés
- Skilled Labor Job Search Resources
- Skilled Labor Job Search Resources
- Reading & Using Job Ads
- Job Applications
- Résumés
- Cover Letters
- Interviews
- Follow-Up, Thank You Letters
- Sample Résumés & Letters
- Résumé & Cover Letter Presentations
- Preparing an Application
- English as a Second Language
- World Englishes
- ESL Instructors, Tutors
- ESL Students
- ESL Students Introduction
- US Higher Education: A Local Introduction
- Tips for Writing in North American Colleges
- Plagiarism and ESL Writers
- Writing for Global Business Audiences: An Introduction
- Writing for an Indian Business Audience
- Writing for a Chinese Business Audience
- Understanding Writing Assignments
- Writing for a North American Business Audience
- Key Concepts for Writing in North American Colleges
- Audience Considerations for ESL Writers
- Combining Sentences
- Nominalizations and Subject Position
- Prepositions
- Prepositions
- Prepositions of Direction—To
- Prepositions of Direction—Onto
- Prepositions of Direction—Into
- Prepositions of Spatial Relationship—A
- Prepositions of Spatial Relationship—B
- Prepositions of Spatial Relationship—F-O
- Prepositions of Spatial Relationship—T-W
- Prepositions of Time, Place, and Introducing Objects
- Pronouns
- Punctuation
- Paraphrasing and Summary
- About the OWL
- OWL en Español (Beta)
- Estilo APA 7
- Formato General
- Citas en el Texto: Lo Básico
- Citas en el Texto: Autor o varios Autores
- APA Notas al Pie y Notas Finales
- La Lista de Referencias: Reglas Básicas
- Lista de Referencia APA: Autores
- Lista de referencias: Artículos de publicaciones periódicas
- Lista de Referencias: Libros
- Lista de referencias: Otras fuentes de impresión
- Lista de Referencias APA: Fuentes Electrónicas
- Lista de Referencia APA: Medios Audiovisuales
- Lista de Referencias: Otras Fuentes No Impresas
- Encabezados y Seriación
- Tablas y Figuras
- Estilo MLA
- Formato General de MLA
- Formato MLA y Guía de Estilo
- MLA Citaciones en texto: Lo Básico
- Formato de Citas
- Notas al Final/Notas al Pie
- Índice de Obras Citadas de MLA: Formato Básico
- Página de Trabajos Citados: Libros
- Publicaciones Periódicas
- Obras Citadas de MLA: Fuentes Electrónicas
- Obras citadas de MLA: Otras fuentes comunes
- Abreviaturas en el formato MLA
- MLA Muestra de Trabajos Citados Página
- Tablas, Figuras y Ejemplos
- Estilo APA 7
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