APA (7th ed.) Citation

United States. Post Office Department. (1944). Postal bulletin, Mar. 28, 1944. [s.n.].

Chicago Style (17th ed.) Citation

United States. Post Office Department. Postal Bulletin, Mar. 28, 1944. [Washington]: [s.n.], 1944.

MLA (9th ed.) Citation

United States. Post Office Department. Postal Bulletin, Mar. 28, 1944. [s.n.], 1944.

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