APA (7th ed.) Citation

Geological Survey (U.S.) & Clayton, J. L. (1992). Organic geochemistry of black shales, marlstones, and oils of middle Pennsylvanian rocks from the northern Denver and southeastern Powder River Basins, Wyoming, Nebraska, and Colorado. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and J. L. Clayton. Organic Geochemistry of Black Shales, Marlstones, and Oils of Middle Pennsylvanian Rocks from the Northern Denver and Southeastern Powder River Basins, Wyoming, Nebraska, and Colorado. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 1992.

MLA (9th ed.) Citation

Geological Survey (U.S.) and J. L. Clayton. Organic Geochemistry of Black Shales, Marlstones, and Oils of Middle Pennsylvanian Rocks from the Northern Denver and Southeastern Powder River Basins, Wyoming, Nebraska, and Colorado. U.S. Dept. of the Interior, U.S. Geological Survey, 1992.