You should include a citation if you:
1. Use a direct quote
2. Summarize an outside source
3. Paraphrase an idea, quote, or passage from someone else
If you are unsure about whether you need to cite, go ahead and do it. Better safe than sorry when it comes to avoiding plagiarism.
Guilford defines plagiarism broadly as presenting the interpretations, wording, images or original conceptions of others as one’s own without appropriate acknowledgment. Individual faculty members determine what constitutes “appropriate acknowledgment” within the context of their courses, either by specifically stating requirements or by acknowledging the standard practice within a given discipline. The charge of plagiarism applies to any and all academic work whether done inside or outside of the classroom and whether submitted as a rough draft or a final product (Guilford College Academic Honor Code, Office of the Academic Dean).
The resources below instruct your use of others' work and ideas: