APA (7th ed.) Citation

Christensen, C. M., & Stephens, J. C. (1967). Geology and water resources of Clay County, South Dakota. Science Center, University of South Dakota.

Chicago Style (17th ed.) Citation

Christensen, Cleo M., and Jerry C. Stephens. Geology and Water Resources of Clay County, South Dakota. Vermillion: Science Center, University of South Dakota, 1967.

MLA (8th ed.) Citation

Christensen, Cleo M., and Jerry C. Stephens. Geology and Water Resources of Clay County, South Dakota. Science Center, University of South Dakota, 1967.