APA (7th ed.) Citation

Geological Survey (U.S.), Sherrod, D. R., Minor, S. A., & Vercoutere, T. L. (1989). Geologic map of the Sheepshead Mountains, Harney and Malheur counties, Oregon. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), David R. Sherrod, Scott A. Minor, and Thomas L. Vercoutere. Geologic Map of the Sheepshead Mountains, Harney and Malheur Counties, Oregon. Reston, Va.: The Survey, 1989.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geologic Map of the Sheepshead Mountains, Harney and Malheur Counties, Oregon. The Survey, 1989.