APA (7th ed.) Citation

Gonzales, D. A., & Colorado Geological Survey. (2003). Geologic map of the Electra Lake 7.5-minute quadrangle, La Plata County, Colorado. The Survey.

Chicago Style (17th ed.) Citation

Gonzales, David A., and Colorado Geological Survey. Geologic Map of the Electra Lake 7.5-minute Quadrangle, La Plata County, Colorado. Denver, Colo.: The Survey, 2003.

MLA (8th ed.) Citation

Gonzales, David A., and Colorado Geological Survey. Geologic Map of the Electra Lake 7.5-minute Quadrangle, La Plata County, Colorado. The Survey, 2003.