APA (7th ed.) Citation

United States. Army. Air Corps. (1921). Notes on airplane flight endurance (I). U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Notes on Airplane Flight Endurance (I). Washington: U.S. GPO, 1921.

MLA (9th ed.) Citation

United States. Army. Air Corps. Notes on Airplane Flight Endurance (I). U.S. GPO, 1921.

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