APA (7th ed.) Citation

Geological Survey (U.S.), Cannon, W. F., & Nicholson, S. W. (2001). Geologic map of the Keweenaw Peninsula and adjacent area, Michigan. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), William F. Cannon, and Suzanne W. Nicholson. Geologic Map of the Keweenaw Peninsula and Adjacent Area, Michigan. Reston, VA: The Survey, 2001.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geologic Map of the Keweenaw Peninsula and Adjacent Area, Michigan. The Survey, 2001.