Cite
MLA (8th Edition)
Ryder, Robert T. Stratigraphic Framework of Cambrian and Ordovician Rocks In the Appalachian Basin From Sequatchie County, Tennessee, through Eastern Kentucky, to Mingo County, West Virginia. U.S. Dept. of the Interior, U.S. Geological Survey, For sale by U.S. Geological Survey, Information Services, 2008.
APA (7th Edition)
Ryder, R. T. (2008). Stratigraphic framework of Cambrian and Ordovician rocks in the Appalachian Basin from Sequatchie County, Tennessee, through eastern Kentucky, to Mingo County, West Virginia. U.S. Dept. of the Interior, U.S. Geological Survey, For sale by U.S. Geological Survey, Information Services.
Chicago (17th Edition)
Ryder, Robert T. “Stratigraphic Framework of Cambrian and Ordovician Rocks in the Appalachian Basin from Sequatchie County, Tennessee, through Eastern Kentucky, to Mingo County, West Virginia.” Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey, For sale by U.S. Geological Survey, Information Services, 2008.