APA (7th ed.) Citation

United States. Post Office Department. (1923). General instructions to postmaster at newly established domestic money order office. GPO.

Chicago Style (17th ed.) Citation

United States. Post Office Department. General Instructions to Postmaster at Newly Established Domestic Money Order Office. [Washington]: GPO, 1923.

MLA (9th ed.) Citation

United States. Post Office Department. General Instructions to Postmaster at Newly Established Domestic Money Order Office. GPO, 1923.