APA (7th ed.) Citation

(1942). The Design of Propeller Blade Roots. [s.n.].

Chicago Style (17th ed.) Citation

The Design of Propeller Blade Roots. [Washington]: [s.n.], 1942.

MLA (9th ed.) Citation

The Design of Propeller Blade Roots. [s.n.], 1942.

Warning: These citations may not always be 100% accurate.