APA (7th ed.) Citation

Geological Survey (U.S.) & Donnell, J. R. (1992). Geologic map of the De Beque quadrangle, Garfield and Mesa counties, Colorado. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and John R. Donnell. Geologic Map of the De Beque Quadrangle, Garfield and Mesa Counties, Colorado. Reston, VA: The Survey, 1992.

MLA (9th ed.) Citation

Geological Survey (U.S.) and John R. Donnell. Geologic Map of the De Beque Quadrangle, Garfield and Mesa Counties, Colorado. The Survey, 1992.