APA (7th ed.) Citation

United States. Bureau of Mines. (1939). Formation, collection, and treatment of coal dust in mines. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Formation, Collection, and Treatment of Coal Dust in Mines. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Bureau of Mines. Formation, Collection, and Treatment of Coal Dust in Mines. [s.n.], 1939.