Reference works are an excellent place to begin a research project. They can help you get background information on an author or genre of literature and often supply bibliographies of primary and secondary texts associated with the author or genre. However, they should not normally be cited as sources in a research paper.
Hint: The resources on this page are electronic ones. Reference books are listed separately.
Credo Reference offers topic guides on many aspects of German language, literature, and culture. Here are just a few to get you started.