Pennsylvania. Bureau of Topographic and Geologic Survey & Root, S. I. (1978). Geology and mineral resources of the Carlisle and Mechanicsburg quadrangles, Cumberland county, Pennsylvania. Commonwealth of Pennsylvania, Department of Environmental Resources, Bureau of Topographic and Geologic Survey.
Chicago Style (17th ed.) CitationPennsylvania. Bureau of Topographic and Geologic Survey and Samuel I. Root. Geology and Mineral Resources of the Carlisle and Mechanicsburg Quadrangles, Cumberland County, Pennsylvania. Harrisburg: Commonwealth of Pennsylvania, Department of Environmental Resources, Bureau of Topographic and Geologic Survey, 1978.
MLA (9th ed.) CitationPennsylvania. Bureau of Topographic and Geologic Survey and Samuel I. Root. Geology and Mineral Resources of the Carlisle and Mechanicsburg Quadrangles, Cumberland County, Pennsylvania. Commonwealth of Pennsylvania, Department of Environmental Resources, Bureau of Topographic and Geologic Survey, 1978.