Hansen, W. R., Rowley, P. D., & Geological Survey. (1980). Geologic map of the Hells Canyon quadrangle, Moffat County, Colorado. U.S. Geological Survey.
Chicago Style (17th ed.) CitationHansen, Wallace R., Peter D. Rowley, and Geological Survey. Geologic Map of the Hells Canyon Quadrangle, Moffat County, Colorado. Reston, Va.: U.S. Geological Survey, 1980.
MLA (8th ed.) CitationHansen, Wallace R., et al. Geologic Map of the Hells Canyon Quadrangle, Moffat County, Colorado. U.S. Geological Survey, 1980.
Warning: These citations may not always be 100% accurate.