APA (7th ed.) Citation

United States. National Advisory Committee for Aeronautics. (1941). Present and Future Problems of Airplane Propulsion. [s.n.].

Chicago Style (17th ed.) Citation

United States. National Advisory Committee for Aeronautics. Present and Future Problems of Airplane Propulsion. [Washington]: [s.n.], 1941.

MLA (9th ed.) Citation

United States. National Advisory Committee for Aeronautics. Present and Future Problems of Airplane Propulsion. [s.n.], 1941.