APA, MLA, Chicago...What style manual is your class using?
MLA Handbook 8th ed.
Publication Manual of the American Psychological Association
The Chicago Manual of Style by The Purdue Online Writing Lab (OWL) has over 200 free resources including ■Writing and Teaching Writing ■Research ■Grammar and Mechanics ■Style Guides ■ESL (English as a Second Language) ■Job Search and Professional Writing.
OWL also has detailed instructions on;
MLA citations; APA citations; Chicago Manual of Style citations
Interactive site that helps to format your paper in the required citation style.