APA (7th ed.) Citation

(1940). The Cause of Welding Cracks in Aircraft Steels. [s.n.].

Chicago Style (17th ed.) Citation

The Cause of Welding Cracks in Aircraft Steels. [Washington]: [s.n.], 1940.

MLA (9th ed.) Citation

The Cause of Welding Cracks in Aircraft Steels. [s.n.], 1940.