APA (7th ed.) Citation

United States. Division of Labor Standards. (1939). Silicosis prevention, dust control in foundries. [s.n.].

Chicago Style (17th ed.) Citation

United States. Division of Labor Standards. Silicosis Prevention, Dust Control in Foundries. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Division of Labor Standards. Silicosis Prevention, Dust Control in Foundries. [s.n.], 1939.

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