APA (7th ed.) Citation

United States. Railway Mail Service. (1931). Instructions for field officials relative to star route service. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Railway Mail Service. Instructions for Field Officials Relative to Star Route Service. Washington: U.S. GPO, 1931.

MLA (9th ed.) Citation

United States. Railway Mail Service. Instructions for Field Officials Relative to Star Route Service. U.S. GPO, 1931.

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