APA (7th ed.) Citation

United States. Post Office Department. (1926). Regular practice of mailing short-paid letters. GPO.

Chicago Style (17th ed.) Citation

United States. Post Office Department. Regular Practice of Mailing Short-paid Letters. [Washington]: GPO, 1926.

MLA (9th ed.) Citation

United States. Post Office Department. Regular Practice of Mailing Short-paid Letters. GPO, 1926.

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