APA (7th ed.) Citation

United States. National Advisory Committee for Aeronautics. (1939). Wind-tunnel investigation of ground effect on wings with flaps. [s.n.].

Chicago Style (17th ed.) Citation

United States. National Advisory Committee for Aeronautics. Wind-tunnel Investigation of Ground Effect on Wings with Flaps. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. National Advisory Committee for Aeronautics. Wind-tunnel Investigation of Ground Effect on Wings with Flaps. [s.n.], 1939.