APA (7th ed.) Citation

United States. Army. Air Corps. (1920). Preliminary choice of wing section. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Preliminary Choice of Wing Section. Washington: U.S. GPO, 1920.

MLA (9th ed.) Citation

United States. Army. Air Corps. Preliminary Choice of Wing Section. U.S. GPO, 1920.

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