This document discusses the importance of citing sources in research papers to avoid plagiarism. It defines plagiarism as copying others' words and ideas and claiming them as your own. The document explains that sources must be cited using methods like paraphrasing, which is expressing an author's ideas in your own words. It provides examples of properly paraphrasing sources and citing them in parentheses by author name and page number for books or referencing the site or article title. The overall message is that citing sources is required to avoid plagiarism.