APA (7th ed.) Citation

United States. Post Office Department. (1923). List of postal supplies furnished post offices of 3rd class. GPO.

Chicago Style (17th ed.) Citation

United States. Post Office Department. List of Postal Supplies Furnished Post Offices of 3rd Class. [Washington]: GPO, 1923.

MLA (9th ed.) Citation

United States. Post Office Department. List of Postal Supplies Furnished Post Offices of 3rd Class. GPO, 1923.

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