APA (7th ed.) Citation

Erwin, M. L., McFarland, E. R., & Bruce, T. S. (1999). USGS ground-water flow model: An essential tool for managing the water supply of the Virginia coastal plain. [U.S. Dept. of the Interior, U.S. Geological Survey].

Chicago Style (17th ed.) Citation

Erwin, Martha L., E. Randolph McFarland, and T. Scott Bruce. USGS Ground-water Flow Model: An Essential Tool for Managing the Water Supply of the Virginia Coastal Plain. [Reston, Va.]: [U.S. Dept. of the Interior, U.S. Geological Survey], 1999.

MLA (9th ed.) Citation

Erwin, Martha L., et al. USGS Ground-water Flow Model: An Essential Tool for Managing the Water Supply of the Virginia Coastal Plain. [U.S. Dept. of the Interior, U.S. Geological Survey], 1999.