APA (7th ed.) Citation

United States. Postmaster General. (1925). Overnight air service, New York-Chicago. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Overnight Air Service, New York-Chicago. Washington: U.S. GPO, 1925.

MLA (9th ed.) Citation

United States. Postmaster General. Overnight Air Service, New York-Chicago. U.S. GPO, 1925.

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