APA (7th ed.) Citation

Geological Survey (U.S.), Hail, W. J., Jr., & Smith, M. C. (1997). Geologic map of the southern part of the Piceance Creek basin, northwestern Colorado. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), William J. Hail, Jr, and Marjorie C. Smith. Geologic Map of the Southern Part of the Piceance Creek Basin, Northwestern Colorado. [Reston, Va.]: The Survey, 1997.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geologic Map of the Southern Part of the Piceance Creek Basin, Northwestern Colorado. The Survey, 1997.