APA (7th ed.) Citation

United States. Post Office Department. (1936). Postal bulletin, Feb. 21, 1936. [s.n.].

Chicago Style (17th ed.) Citation

United States. Post Office Department. Postal Bulletin, Feb. 21, 1936. [Washington]: [s.n.], 1936.

MLA (9th ed.) Citation

United States. Post Office Department. Postal Bulletin, Feb. 21, 1936. [s.n.], 1936.

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