APA (7th ed.) Citation

Geological Survey (U.S.), Ketner, K. B., & Evans, J. G. (1988). Geologic map of the Peko Hills, Elko County, Nevada. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Keith B. Ketner, and James George Evans. Geologic Map of the Peko Hills, Elko County, Nevada. Reston, Va.: The Survey, 1988.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geologic Map of the Peko Hills, Elko County, Nevada. The Survey, 1988.