APA (7th ed.) Citation

Geological Survey (U.S.), Oregon. Department of Geology and Mineral Industries, Washington Geological Survey (2017- ), & Wells, R. E. (2020). Geologic map of the Greater Portland Metropolitan Area and surrounding region, Oregon and Washington. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Oregon. Department of Geology and Mineral Industries, Washington Geological Survey (2017- ), and Ray E. Wells. Geologic Map of the Greater Portland Metropolitan Area and Surrounding Region, Oregon and Washington. Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2020.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geologic Map of the Greater Portland Metropolitan Area and Surrounding Region, Oregon and Washington. U.S. Department of the Interior, U.S. Geological Survey, 2020.