APA (7th ed.) Citation

Geological Survey (U.S.), Hedge, C. E., Harrison, J. E., & Peterman, Z. E. (1986). The Precambrian of the Rocky Mountain region. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Carl E. Hedge, Jack Edward Harrison, and Zell E. Peterman. The Precambrian of the Rocky Mountain Region. Washington: Dept. of the Interior, U.S. Geological Survey, 1986.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. The Precambrian of the Rocky Mountain Region. Dept. of the Interior, U.S. Geological Survey, 1986.