APA (7th ed.) Citation

Geological Survey (U.S.) & Drewes, H. (1986). Geologic map of the northern part of the Animas Mountains, Hidalgo County, New Mexico. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Harald Drewes. Geologic Map of the Northern Part of the Animas Mountains, Hidalgo County, New Mexico. Reston, Va.: The Survey, 1986.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Harald Drewes. Geologic Map of the Northern Part of the Animas Mountains, Hidalgo County, New Mexico. The Survey, 1986.