APA

United States, .Manual of Classification. Washington, D.C: U.S. Dept. of Commerce, Patent and Trademark Office, Search znd Information Resources.

Chicago

United States, .Manual of Classification. Washington, D.C: U.S. Dept. of Commerce, Patent and Trademark Office, Search znd Information Resources.

Harvard

United States, .Manual of Classification. Washington, D.C: U.S. Dept. of Commerce, Patent and Trademark Office, Search znd Information Resources.

MLA

United States, .Washington, D.C: U.S. Dept. of Commerce, Patent and Trademark Office, Search znd Information Resources. .