Which style manual you use to cite primary source materials will depend on your field of study. Follow your professor's specific guidelines.
The latest editions of the APA, MLA, and Chicago style manuals are kept in Reference or on Course Reserves at most ULS libraries.
Additionally, links to online sources that guide you through correctly citing the information you've found are available on the ULS website.
Keep track of all of your reference lists and bibliographies. Pitt's library resources work with citation management tools and allow you to import citations from sources like PITTCat+ and article databases.