In a research paper, you will draw on the work of other writers, and you must document their contributions by citing your sources. Sources are cited for two reasons:
Borrowing another writer’s language, sentence structures, or ideas without proper acknowledgment is a form of dishonesty known as plagiarism.
You must include a citation when you quote from a source, when you summarize or paraphrase, and when you borrow facts that are not common knowledge (see also 54b).