APA (7th ed.) Citation

United States. National Advisory Committee for Aeronautics. (1939). Power of aircraft engines at altitude. [s.n.].

Chicago Style (17th ed.) Citation

United States. National Advisory Committee for Aeronautics. Power of Aircraft Engines at Altitude. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. National Advisory Committee for Aeronautics. Power of Aircraft Engines at Altitude. [s.n.], 1939.