APA (7th ed.) Citation

Geological Survey (U.S.) & Howard, K. A. (1979). Geologic map of the Ruby Mountains, Nevada. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Keith A. Howard. Geologic Map of the Ruby Mountains, Nevada. Reston, Va.: U.S. Geological Survey, 1979.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Keith A. Howard. Geologic Map of the Ruby Mountains, Nevada. U.S. Geological Survey, 1979.