APA (7th ed.) Citation

United States. Army. (1920). German captive balloon organization. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. German Captive Balloon Organization. Washington: U.S. GPO, 1920.

MLA (9th ed.) Citation

United States. Army. German Captive Balloon Organization. U.S. GPO, 1920.

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