The Craft of Research by 
Student's Guide to Writing College Papers by 
They Say / I Say by Below is information pertaining to MLA, APA, and Chicago styles.
There are style books for each of these styles (and more) at the Research Help Desk on the main floor of the Library. You can also ask a citation question at the Help Desk, the walk-up Writing Center help desk in the Library, or make an appointment with me.