APA (7th ed.) Citation

United States. Patent Office. (1939). The official gazette of the United States Patent Office, Oct. 31, 1939. [s.n.].

Chicago Style (17th ed.) Citation

United States. Patent Office. The Official Gazette of the United States Patent Office, Oct. 31, 1939. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Patent Office. The Official Gazette of the United States Patent Office, Oct. 31, 1939. [s.n.], 1939.