APA (7th ed.) Citation

Wilmarth, M. G., Keroher, G. C., & Luttrell, G. L. W. (1938). Lexicon of geologic names of the United States. U.S. Dept. of the Interior, Geological Survey : U.S. G.P.O..

Chicago Style (17th ed.) Citation

Wilmarth, M. Grace, Grace C. Keroher, and Gwendolyn Lewise Werth Luttrell. Lexicon of Geologic Names of the United States. Washington: U.S. Dept. of the Interior, Geological Survey : U.S. G.P.O., 1938.

MLA (9th ed.) Citation

Wilmarth, M. Grace, et al. Lexicon of Geologic Names of the United States. U.S. Dept. of the Interior, Geological Survey : U.S. G.P.O., 1938.