Crediting the work of other authors in your paper is a two step process:
(1) Within the text of your paper, insert a citation that attributes the cited information (quotation, paraphrase, or summary) to the original source.
(2) At the end of your paper, include a list of all of the works you have cited. List your sources alphabetically by author's last name. (If no author is listed, use the first word of the title for alphabetization purposes. Ignore a, an, or the.
Different journals and disciplines use different citation styles. Examples of commonly used styles include MLA, APA, Chicago, and CSE. The exact rules for each style differ.
The overall goal, though, is the same: attribute ideas to their original source, and include the necessary information about the source that will allow your reader to look it up and consult it.
If you have questions about citing your sources, help is available! Ask your professor, a librarian, or a Writing Studio Associate. Or, consult one of the many resources that are available online or in print: