Description “To document” means to tell the reader the source of any material a writer uses in his or her essay. Material needing documentation includes facts, statistical data, and ideas as well as the words used to express such information. Writers need to document, or cite, sources whether or not they are using the exact words of the original. If using any of the exact words (even just a phrase), writers need to put quotation marks around those words in addition to citing the source. Failure to use quotation marks appropriately constitutes plagiarism. APA style requires writers to place the author’s last name, year of publication, and page number in parentheses immediately after a quotation or the author’s last name and year of publication before the quotation and the page number afterwards .