APA (7th ed.) Citation

Geological Survey (U.S.) & Association of American State Geologists. (1979). The Mississippian and Pennsylvanian (Carboniferous) systems in the United States. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Association of American State Geologists. The Mississippian and Pennsylvanian (Carboniferous) Systems in the United States. Washington: United States Department of the Interior, Geological Survey, 1979.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Association of American State Geologists. The Mississippian and Pennsylvanian (Carboniferous) Systems in the United States. United States Department of the Interior, Geological Survey, 1979.