APA (7th ed.) Citation

Geological Survey (U.S.), Vallier, T. L., & Brooks, H. C. (1994). Stratigraphy, physiography, and mineral resources of the Blue Mountains region. U.S. G.P.O..

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Tracy L. Vallier, and Howard C. Brooks. Stratigraphy, Physiography, and Mineral Resources of the Blue Mountains Region. Washington, D.C.: U.S. G.P.O., 1994.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Stratigraphy, Physiography, and Mineral Resources of the Blue Mountains Region. U.S. G.P.O., 1994.