Citation Guides & Style Manuals
Some Tips for When to Cite:
The Jacobson Center for Writing, Teaching and Learning offers individual help with writing and also this useful guide:
Writing Papers: A Handbook for Students at Smith College
Read "Using Sources Effectively" starting on page 50+; and
"Acknowledging and Documenting Your Sources" on page 57+.
RefWorks is web-based software that helps researchers gather, manage, store, and generate citations and bibliographies.
Zotero is another web-based option for managing your citations and for creating bibliographies.