APA (7th ed.) Citation

United States. National Advisory Committee for Aeronautics. (1939). Observations in flight of region of stalled flow over blades of autogiro rotor. [s.n.].

Chicago Style (17th ed.) Citation

United States. National Advisory Committee for Aeronautics. Observations in Flight of Region of Stalled Flow over Blades of Autogiro Rotor. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. National Advisory Committee for Aeronautics. Observations in Flight of Region of Stalled Flow over Blades of Autogiro Rotor. [s.n.], 1939.