United States. Patent and Trademark Office. (2012). Protecting your trademark: Enhancing your rights through federal registration. The Patent and Trademark Office.
Chicago Style (17th ed.) CitationUnited States. Patent and Trademark Office. Protecting Your Trademark: Enhancing Your Rights Through Federal Registration. [Alexandria, Va.]: The Patent and Trademark Office, 2012.
MLA (9th ed.) CitationUnited States. Patent and Trademark Office. Protecting Your Trademark: Enhancing Your Rights Through Federal Registration. The Patent and Trademark Office, 2012.
Warning: These citations may not always be 100% accurate.