APA (7th ed.) Citation

Swanson, R. D. (1993). A description of hydrogeologic units in the Portland Basin, Oregon and Washington. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Swanson, R. D. A Description of Hydrogeologic Units in the Portland Basin, Oregon and Washington. Portland, Oregon: U.S. Geological Survey, 1993.

MLA (9th ed.) Citation

Swanson, R. D. A Description of Hydrogeologic Units in the Portland Basin, Oregon and Washington. U.S. Geological Survey, 1993.

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