Plagiarism - Give Credit Where Credit Is Due!
"An act of fraud. It involves both stealing someone else's work and lying about it afterward."
To avoid plagiarism, you must give credit whenever you use another person’s idea, opinion, or theory; any facts, statistics, graphs, drawings—any pieces of information—that are not common knowledge; quotations of another person’s actual spoken or written words; or paraphrase of another person’s spoken or written words.
Deciding if something is "common knowledge" Generally speaking, you can regard something as common knowledge if you find the same information undocumented in at least five credible sources. Additionally, it might be common knowledge if you think the information you're presenting is something your readers will already know, or something that a person could easily find in general reference sources. But when in doubt, cite; if the citation turns out to be unnecessary, your teacher or editor will tell you.