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
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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.