APA (7th ed.) Citation

Hack, J. T. (1977). Geologic map for land-use planning, Prince Georges County, Maryland. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Hack, John T. Geologic Map for Land-use Planning, Prince Georges County, Maryland. Reston, Va.: U.S. Geological Survey, 1977.

MLA (8th ed.) Citation

Hack, John T. Geologic Map for Land-use Planning, Prince Georges County, Maryland. U.S. Geological Survey, 1977.

Warning: These citations may not always be 100% accurate.