APA (7th ed.) Citation

Popp, J. T., & McCulloch, C. M. (1976). Geological factors affecting methane in the Beckley coalbed. U.S. Dept. of the Interior, Bureau of Mines.

Chicago Style (17th ed.) Citation

Popp, John T., and C. M. McCulloch. Geological Factors Affecting Methane in the Beckley Coalbed. [Washington]: U.S. Dept. of the Interior, Bureau of Mines, 1976.

MLA (9th ed.) Citation

Popp, John T., and C. M. McCulloch. Geological Factors Affecting Methane in the Beckley Coalbed. U.S. Dept. of the Interior, Bureau of Mines, 1976.