APA (7th ed.) Citation

United States. Bureau of Mines. (1937). Pebble-­phosphate mine accident experience. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Pebble-­phosphate Mine Accident Experience. [Washington]: [s.n.], 1937.

MLA (9th ed.) Citation

United States. Bureau of Mines. Pebble-­phosphate Mine Accident Experience. [s.n.], 1937.