A bibliography is a list of sources (books, journals, Web sites, periodicals, etc.) one has used for researching a topic. Bibliographies are sometimes called "References" or "Works Cited" depending on the style format you are using. A bibliography usually just includes the bibliographic information (i.e., the author, title, publisher, etc.).
An annotation is a summary and/or evaluation. Therefore, an annotated bibliography includes a summary and/or evaluation of each of the sources. Depending on your project or the assignment, your annotations may do one or more of the following.
For more help, see our handout on paraphrasing sources.
For more help, see our handouts on evaluating resources.
Your annotated bibliography may include some of these, all of these, or even others. If you're doing this for a class, you should get specific guidelines from your instructor.
Common elements often found in Annotated Bibliography entries
Cite the source using MLA style.
Describe the main ideas, arguments, themes, theses, or methodology, and identify the intended audience.
Explain the author’s expertise, point of view, and any bias he/she may have.
Compare to other sources on the same topic that you have also cited to show similarities and differences.
Explain why each source is useful for your research topic and how it relates to your topic.
Evaluate the strengths and weaknesses of each source.
Identify the observations or conclusions of the author.
Note any common or seminal works mentioned or cited
An annotated bibliography may be assigned for for the following reasons
On a broader level, writing an annotated bibliography can lay the foundation for conducting a larger research project. It serves as a method to evaluate prior research and where your proposed study may fit within it. By critically analyzing and synthesizing the contents of a variety of sources, you can begin to evaluate what the key issues are in relation to the research problem and, by so doing, gain a more informed perspective about the deliberations taking place among scholars. As a result of this analysis, you are better prepared to develop your own arguments and contributions to the literature.
To learn about your topic:
Writing an annotated bibliography is excellent preparation for a research project. Just collecting sources for a bibliography is useful, but when you have to write annotations for each source, you're forced to read each source more carefully. You begin to read more critically instead of just collecting information.
At the professional level, annotated bibliographies allow you to see what has been done in the literature and where your own research or scholarship can fit.
To help you formulate a thesis: Every good research paper is an argument. The purpose of research is to state and support a thesis. So, a very important part of research is developing a thesis that is debatable, interesting, and current. Writing an annotated bibliography can help you gain a good perspective on what is being said about your topic.
By reading and responding to a variety of sources on a topic, you'll start to see what the issues are, what people are arguing about, and you'll then be able to develop your own point of view.
To help other researchers: Extensive and scholarly annotated bibliographies are sometimes published. They provide a comprehensive overview of everything important that has been and is being said about that topic. You may not ever get your annotated bibliography published, but as a researcher, you might want to look for one that has been published about your topic.
Tip: Annotations are original descriptions that you create after reading the document. You may find a short summary, often titled "abstract," at the beginning of journal articles. Do not copy the abstract as that would be plagiarism.