APA (7th ed.) Citation

United States. Army. Air Corps. (1921). The "1920" model Hart reversible propeller manual and parts list. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. The "1920" Model Hart Reversible Propeller Manual and Parts List. Washington: U.S. GPO, 1921.

MLA (9th ed.) Citation

United States. Army. Air Corps. The "1920" Model Hart Reversible Propeller Manual and Parts List. U.S. GPO, 1921.

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