APA (7th ed.) Citation

Howell, S. P. (1931). Explosives accidents in the anthracite mines of Pennsylvania, 1923-1927. U.S. G.P.O..

Chicago Style (17th ed.) Citation

Howell, Spencer P. Explosives Accidents in the Anthracite Mines of Pennsylvania, 1923-1927. Washington, D.C.: U.S. G.P.O., 1931.

MLA (8th ed.) Citation

Howell, Spencer P. Explosives Accidents in the Anthracite Mines of Pennsylvania, 1923-1927. U.S. G.P.O., 1931.

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