APA (7th ed.) Citation

Wilshusen, J. P. (1979). Environmental geology of the Greater York area, York County, Pennsylvania. Topographic and Geologic Survey.

Chicago Style (17th ed.) Citation

Wilshusen, John P. Environmental Geology of the Greater York Area, York County, Pennsylvania. [Harrisburg, Pa.]: Topographic and Geologic Survey, 1979.

MLA (9th ed.) Citation

Wilshusen, John P. Environmental Geology of the Greater York Area, York County, Pennsylvania. Topographic and Geologic Survey, 1979.