APA (7th ed.) Citation

Geological Survey (U.S.). (1978). El Paso County, Colorado. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). El Paso County, Colorado. Reston, Va.: The Survey, 1978.

MLA (9th ed.) Citation

Geological Survey (U.S.). El Paso County, Colorado. The Survey, 1978.

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