APA (7th ed.) Citation

United States. Army. Air Corps. (1921). German captive balloon organization. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. German Captive Balloon Organization. Washington: U.S. GPO, 1921.

MLA (9th ed.) Citation

United States. Army. Air Corps. German Captive Balloon Organization. U.S. GPO, 1921.

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