Reference books are helpful starting places if you need:
Wikipedia can be considered a reference source, but, because the content in Wikipedia can be created by anyone, it has not been entirely accepted by the scholarly community as yet. (Traditionally published reference sources are vetted by scholars, generally.) Read Wikipedia articles with a critical eye in order to detect bias.
Wikipedia articles can be very helpful, however, because they often contain links to external content and additional references listed at the end.
Credo Reference is a collection of quality reference ebooks. Search by keyword to discover reference articles about your topic.
Try some of the following sources too.
U.S. Focus:
Africa Focus:
In addition, there are many more subject encyclopedias in specific disciplines (literature, music, etc.) that may have relevant material for your topic. Consult Laurie Sauer, librarian liaison to the Africana Studies program.