It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Insert references in the text
List references in your bibliography
Cite periodicals, journals, books, reports, published conference proceedings, papers presented at conferences, patents, theses & dissertations, standards, U.S. government documents, and manuals/software.