APA (7th ed.) Citation

United States. Post Office Department. (1982). Postal bulletin, Sept. 2, 1937. [s.n.].

Chicago Style (17th ed.) Citation

United States. Post Office Department. Postal Bulletin, Sept. 2, 1937. [Washington]: [s.n.], 1982.

MLA (9th ed.) Citation

United States. Post Office Department. Postal Bulletin, Sept. 2, 1937. [s.n.], 1982.

Warning: These citations may not always be 100% accurate.