APA (7th ed.) Citation

United States. National Advisory Committee for Aeronautics. (1938). Noise from propellers with symmetrical sections at zero blade angle, II. [s.n.].

Chicago Style (17th ed.) Citation

United States. National Advisory Committee for Aeronautics. Noise from Propellers with Symmetrical Sections at Zero Blade Angle, II. [Washington]: [s.n.], 1938.

MLA (9th ed.) Citation

United States. National Advisory Committee for Aeronautics. Noise from Propellers with Symmetrical Sections at Zero Blade Angle, II. [s.n.], 1938.