You'll find many references in the course of your research. Make sure you keep track of what you find! Citation Management Systems are excellent tools to organize your references.
MLA is likely the most common citation style that you will use in African American Studies classes, but when in doubt, always check with your professor. The MLA Style Center is an excellent resource for learning about the most recent edition, including examples of formatted citations and visual cues for where to find the information needed for them. Purdue OWL has an excellent MLA Guide available online, that contains information about citations, formatting, and basic style. A print copy of the official handbook is also available at the Research Help desk, in the reference collection.