Welcome to the Purdue OWL

Annotated Bibliography Breakdown

Stem Cell Research: An Annotated Bibliography

This is the annotation of the above source, which is formatted according to MLA 2016 (8^th ed.) guidelines for the bibliographic information listed above. If one were really writing an annotation for this source, one would offer a brief summary of what this book says about stem cell research.

After a brief summary, it would be appropriate to assess this source and offer some criticisms of it. Does it seem like a reliable and current source? Why? Is the research biased or objective? Are the facts well documented? Who is the author? Is she qualified in this subject? Is this source scholarly, popular, some of both?

The length of your annotation will depend on the assignment or on the purpose of your annotated bibliography. After summarizing and assessing, you can now reflect on this source. How does it fit into your research? Is this a helpful resource? Too scholarly? Not scholarly enough? Too general/specific? Since "stem cell research" is a very broad topic, has this source helped you to narrow your topic?

Not all annotations have to be the same length. For example, this source is a very short scholarly article. It may only take a sentence or two to summarize. Even if you are using a book, you should only focus on the sections that relate to your topic.

Not all annotated bibliographies assess and reflect; some merely summarize. That may not be the most helpful for you, but, if this is an assignment, you should always ask your instructor for specific guidelines.

Using a variety of sources can help give you a broader picture of what is being said about your topic. You may want to investigate how scholarly sources are treating this topic differently than more popular sources. But again, if your assignment is to only use scholarly sources, then you will probably want to avoid magazines and popular web sites.

The bibliographic information above is proper MLA format (use whatever style is appropriate in your field) and the annotations are in paragraph form. Note also that the entries are alphabetized by the first word in the bibliographic entry. If you are writing an annotated bibliography with many sources, it may be helpful to divide the sources into categories. For example, if putting together an extensive annotated bibliography for stem cell research, it might be best to divide the sources into categories such as ethical concerns, scholarly analyses, and political ramifications.

For more examples, a quick search at a library or even on the Internet should produce several examples of annotated bibliographies in your area.