Below are links to several websites that will assist you in creating and writing a critical annotated bibliography.
University of Toronto Writing an Annotated Bibliography This website provides an excellent source for how to write a summary, how to identify the argument, how to assess the relevance of sources and numerous terms to help you write the sources.
Pierce College library Annotated Bibliographies Critical Annotations Provides a good explanation of what makes a good annotation. Shows several examples as well
Preparing an Annotated Bibliography By University of Maryland University College. Easy to understand guide on how to prepare an annotated bibliography with excellent examples of each type of annotation and what should be included. Critical Annotations are what is required.
Writing an Annotated Bibliography by the Writing center at the University of Wisconsin at Madison. Good general website that describes annotated bibliographies