At the GU-Q reference desk, you can find copies of commonly used style manuals such as The MLA Handbook, The Publication Manual of the American Psychological Association, and The Chicago Manual of Style. You can take advantage of the library's subscription to the online edition of The Chicago Manual of Style. The MLA and APA style manuals are not available online, but you can access many reliable, non-affiliated guides (see, most prominently, Diana Hacker’s Research and Documentation Online).
Both Librarians and Writing Center specialists can assist you with formatting your citations and bibliography.