APA (7th ed.) Citation

United States. Army. Air Corps. (1921). Metal tipping of aircraft propellers. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Metal Tipping of Aircraft Propellers. Washington: U.S. GPO, 1921.

MLA (9th ed.) Citation

United States. Army. Air Corps. Metal Tipping of Aircraft Propellers. U.S. GPO, 1921.

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