Plagiarism is a serious offense.
Thus, it is imperative that you cite your sources with footnotes or endnotes, and a bibliography or works-cited page if requested by your professor. If you quote directly, put the quoted words in quotation marks and cite the source in a note. If you summarize or paraphrase someone else's material or if you borrow a distinctive idea, even though you have not made a direct quote or even used any of the same words, you must still make an acknowledgement or citation in a note.