Annotated bibliography expand on typical bibliographies by including information beyond the basic citation information and commentary on the source.
Although they present each formal documentation entry as it would appear in a source list such as a works cited page, an annotated bibliography includes two types of additional information.
First, following the documentation entry is a short description of the work, including information about its authors and how it was or can be used in a research project.
Second is an evaluation of the work’s validity, reliability, and/or bias. The purpose of the annotation is to summarize, assess, and reflect on the source.
Annotations can be both explanatory and analytical, helping readers understand the research you used to formulate your argument. An annotated bibliography can also help you demonstrate that you have read the sources you will potentially cite in your work. It is a tool to assist in the gathering of these sources and serves as a repository.
You won’t necessarily use all the sources cited in your annotated bibliography in your final work, but gathering, evaluating, and documenting these sources is an integral part of the research process.