APA (7th ed.) Citation

United States. Army. Air Corps. (1925). Iowa, Des Moines, government air mail field. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Iowa, Des Moines, Government Air Mail Field. Washington: U.S. GPO, 1925.

MLA (9th ed.) Citation

United States. Army. Air Corps. Iowa, Des Moines, Government Air Mail Field. U.S. GPO, 1925.

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