APA (7th ed.) Citation

Epis, R. C., & Chapin, C. E. (1974). Stratigraphic nomenclature of the thirtynine mile volcanic field, central Colorado. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Epis, Rudy C., and Charles E. Chapin. Stratigraphic Nomenclature of the Thirtynine Mile Volcanic Field, Central Colorado. [Washington, D.C.]: United States Department of the Interior, Geological Survey, 1974.

MLA (9th ed.) Citation

Epis, Rudy C., and Charles E. Chapin. Stratigraphic Nomenclature of the Thirtynine Mile Volcanic Field, Central Colorado. United States Department of the Interior, Geological Survey, 1974.