Documenting your sources is a must for credible research. NoodleBib allows you to plug in the information for a book, article (print or online), or image to generate a citation in the desired style, such as APA or MLA.
The University Library has a veritable treasure trove of critical essays on these three featured books. A keyword search for the title along with the word "criticism" will bring up relevant results, and a subject search of "American literature African American authors History and criticism." can help provide broader context.
Here's 962 results worth of proof:
Need more convincing? This cat searched for books, and look at him now!