APA (7th ed.) Citation

(1940). Propeller rotation noise due to torque and thrust. [s.n.].

Chicago Style (17th ed.) Citation

Propeller Rotation Noise Due to Torque and Thrust. [Washington]: [s.n.], 1940.

MLA (9th ed.) Citation

Propeller Rotation Noise Due to Torque and Thrust. [s.n.], 1940.