APA (7th ed.) Citation

Thorson, J. P., & Colorado Geological Survey. (2005). Geologic map of the east half of the Larkspur quadrangle, Douglas and El Paso counties, Colorado. Colorado Geological Survey.

Chicago Style (17th ed.) Citation

Thorson, Jon P., and Colorado Geological Survey. Geologic Map of the East Half of the Larkspur Quadrangle, Douglas and El Paso Counties, Colorado. Denver, Colo.: Colorado Geological Survey, 2005.

MLA (8th ed.) Citation

Thorson, Jon P., and Colorado Geological Survey. Geologic Map of the East Half of the Larkspur Quadrangle, Douglas and El Paso Counties, Colorado. Colorado Geological Survey, 2005.