APA (7th ed.) Citation

Ash, S. H. (1931). Accident experience and cost of accidents in Washington coal mines. [publisher not identified].

Chicago Style (17th ed.) Citation

Ash, S. H. Accident Experience and Cost of Accidents in Washington Coal Mines. Washington, D.C.: [publisher not identified], 1931.

MLA (9th ed.) Citation

Ash, S. H. Accident Experience and Cost of Accidents in Washington Coal Mines. [publisher not identified], 1931.