Citing your sources means giving credit to the authors whose information you used when writing a paper. Generally, there will be two parts to this process: (1) a short notation in the text of your paper called an in-text citation and (2) a list at the end of your paper that includes complete information about each source you used. This list is called your "References" or "Works Cited" page. You must cite the source of any idea you borrow, whether you put the idea in your own words ("paraphrase" it), summarize it, or quote it word for word.
There are a variety of "formats" which outline different, very specific, ways to list the title, author, date, and other information of each source you use in writing your paper. Two formats often used in classes at Martin are MLA format and APA format. Your instructor will probably tell you which format you are required to use in his or her class. Failure to give credit to your sources is called plagiarism and can result in lowered grades or more severe consequences.
Watch the video Why Citations Matter below and then choose the citation video at the right corresponding to the format your instructor has assigned, and watch that to get detailed information on how to format your citations correctly.