APA (7th ed.) Citation

United States. Bureau of Standards. (1939). Circular of the Bureau of Standards, C424: Washing, Cleaning, and Polishing Materials. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Standards. Circular of the Bureau of Standards, C424: Washing, Cleaning, and Polishing Materials. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Bureau of Standards. Circular of the Bureau of Standards, C424: Washing, Cleaning, and Polishing Materials. [s.n.], 1939.

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