APA (7th ed.) Citation

United States. Army. Air Corps. (1920). Notes for communications officers (provisional). U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Notes for Communications Officers (provisional). Washington: U.S. GPO, 1920.

MLA (9th ed.) Citation

United States. Army. Air Corps. Notes for Communications Officers (provisional). U.S. GPO, 1920.

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