APA (7th ed.) Citation

United States. Post Office Department. (1926). Improper sale of precanceled stamps. GPO.

Chicago Style (17th ed.) Citation

United States. Post Office Department. Improper Sale of Precanceled Stamps. [Washington]: GPO, 1926.

MLA (9th ed.) Citation

United States. Post Office Department. Improper Sale of Precanceled Stamps. GPO, 1926.

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