APA (7th ed.) Citation

United States. Army. Air Corps. (1920). Aerial navigation instructions (provisional). U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Aerial Navigation Instructions (provisional). Washington: U.S. GPO, 1920.

MLA (9th ed.) Citation

United States. Army. Air Corps. Aerial Navigation Instructions (provisional). U.S. GPO, 1920.

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