APA (7th ed.) Citation

United States. Post Office Department. (1925). Postal revenues and expenditures. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Post Office Department. Postal Revenues and Expenditures. Washington: U.S. GPO, 1925.

MLA (9th ed.) Citation

United States. Post Office Department. Postal Revenues and Expenditures. U.S. GPO, 1925.

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