APA (7th ed.) Citation

Hobbs, S. W., & Hays, W. H. (1990). Ordovician and older rocks of the Bayhorse area, Custer County, Idaho. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Hobbs, S. W., and William Henry Hays. Ordovician and Older Rocks of the Bayhorse Area, Custer County, Idaho. [Reston, Va.]: Department of the Interior, U.S. Geological Survey, 1990.

MLA (9th ed.) Citation

Hobbs, S. W., and William Henry Hays. Ordovician and Older Rocks of the Bayhorse Area, Custer County, Idaho. Department of the Interior, U.S. Geological Survey, 1990.