APA (7th ed.) Citation

Williamson, A. K., & Grubb, H. F. (2001). Ground-water flow in the Gulf Coast aquifer systems, south-central United States. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Williamson, Alex K., and Hayes F. Grubb. Ground-water Flow in the Gulf Coast Aquifer Systems, South-central United States. Denver, CO: U.S. Geological Survey, 2001.

MLA (9th ed.) Citation

Williamson, Alex K., and Hayes F. Grubb. Ground-water Flow in the Gulf Coast Aquifer Systems, South-central United States. U.S. Geological Survey, 2001.