APA (7th ed.) Citation

Geological Survey (U.S.), Geological Survey (U.S.), & Colorado Geological Survey. (1977). Energy resources map of Colorado. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Geological Survey (U.S.), and Colorado Geological Survey. Energy Resources Map of Colorado. Reston, Va.: U.S. Geological Survey, 1977.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Energy Resources Map of Colorado. U.S. Geological Survey, 1977.

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