Citation generator, research platform.

If you want to do it yourself . . . Style Guides

APA (American Psychological Association) - typically used for the sciences.

MLA (Modern Language Association) - typically used for the Humanities (English, Social Studies, etc.)

Books

The Elements of Style by William Strunk, Jr. and E.B. White (808 STRU)

Writers, INC: a Student Handbook for Writing and Learning by Patrick Sebranek et al. (808.042 SEBR)

Write for College: a Student Handbook by Patrick Sebranek et al. (808.042 SEBR)