APA (7th ed.) Citation

United States. National Advisory Committee for Aeronautics. (1937). The gyroplane--its principles and its possibilities. [s.n.].

Chicago Style (17th ed.) Citation

United States. National Advisory Committee for Aeronautics. The Gyroplane--its Principles and Its Possibilities. [Washington]: [s.n.], 1937.

MLA (9th ed.) Citation

United States. National Advisory Committee for Aeronautics. The Gyroplane--its Principles and Its Possibilities. [s.n.], 1937.