APA (7th ed.) Citation

United States official postal guide. Oct 1874-Oct. 1954. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

United States Official Postal Guide. Oct 1874-Oct. 1954. Washington: U.S. Govt. Print. Off.

MLA (9th ed.) Citation

United States Official Postal Guide. Oct 1874-Oct. 1954. U.S. Govt. Print. Off.

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