APA (7th ed.) Citation

Collins, C. A., & Broad, T. M. (1996). Ground-water pumpage in the Willamette lowland regional aquifer system, Oregon and Washington, 1990. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Collins, C. A., and Tyson M. Broad. Ground-water Pumpage in the Willamette Lowland Regional Aquifer System, Oregon and Washington, 1990. Portland, Oregon: U.S. Geological Survey, 1996.

MLA (9th ed.) Citation

Collins, C. A., and Tyson M. Broad. Ground-water Pumpage in the Willamette Lowland Regional Aquifer System, Oregon and Washington, 1990. U.S. Geological Survey, 1996.