An Annotated Bibliography is made up of three parts:
Citation--this is in either APA or MLA format; you include one citation for each source you found in your research
Summary--a short summary of what is included in your source, which may be composed of the reasoning behind their research, research methods, and conclusions reached
Evaluation--a short evaluation of the source from your point of view; would you be able to use it for your paper? Why or why not?