APA (7th ed.) Citation

Cash, F. E., & Humphrey, H. B. (1930). Fatalities in Alabama coal mines. U.S. Dept. of Commerce, Bureau of Mines.

Chicago Style (17th ed.) Citation

Cash, F. E., and Hiram Brown Humphrey. Fatalities in Alabama Coal Mines. Washington, D.C.: U.S. Dept. of Commerce, Bureau of Mines, 1930.

MLA (8th ed.) Citation

Cash, F. E., and Hiram Brown Humphrey. Fatalities in Alabama Coal Mines. U.S. Dept. of Commerce, Bureau of Mines, 1930.