APA (7th ed.) Citation

Ruppert, L. F., & Ryder, R. T. (2014). Coal and petroleum resources in the Appalachian basin: Distribution, geologic framework, and geochemical character. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Ruppert, Leslie F., and Robert T. Ryder. Coal and Petroleum Resources in the Appalachian Basin: Distribution, Geologic Framework, and Geochemical Character. Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2014.

MLA (9th ed.) Citation

Ruppert, Leslie F., and Robert T. Ryder. Coal and Petroleum Resources in the Appalachian Basin: Distribution, Geologic Framework, and Geochemical Character. U.S. Department of the Interior, U.S. Geological Survey, 2014.