APA (7th ed.) Citation

McCulloch, C. M., Deul, M., & United States. Bureau of Mines. (1973). Geologic factors causing roof instability and methane emission problems: The Lower Kittanning coalbed, Cambria County, Pa. U.S. Dept. of Interior, Bureau of Mines.

Chicago Style (17th ed.) Citation

McCulloch, C. M., Maurice Deul, and United States. Bureau of Mines. Geologic Factors Causing Roof Instability and Methane Emission Problems: The Lower Kittanning Coalbed, Cambria County, Pa. [Washington, D.C.]: U.S. Dept. of Interior, Bureau of Mines, 1973.

MLA (8th ed.) Citation

McCulloch, C. M., et al. Geologic Factors Causing Roof Instability and Methane Emission Problems: The Lower Kittanning Coalbed, Cambria County, Pa. U.S. Dept. of Interior, Bureau of Mines, 1973.