Find the style of your field and follow it. There are ample guides on line and in print. Check out my English 103 syllabus for helpful documentation links. Cite what you borrow, from words to ideas. If in doubt, check your handbook or ask me.
Gray areas exist, but when in doubt, cite.
If you have a learning disability, please tell me right away so that we can make arrangements for alternate procedures where they are needed. SEPT 2 Harbrace, ch.