APA (7th ed.) Citation

Wilmarth, V. R., & Smith, R. D. (1957). Preliminary geologic map of the southwest part of the Minnekahta quadrangle, Fall River County, South Dakota. The Survey.

Chicago Style (17th ed.) Citation

Wilmarth, V. R., and R. D. Smith. Preliminary Geologic Map of the Southwest Part of the Minnekahta Quadrangle, Fall River County, South Dakota. Washington, D.C.: The Survey, 1957.

MLA (9th ed.) Citation

Wilmarth, V. R., and R. D. Smith. Preliminary Geologic Map of the Southwest Part of the Minnekahta Quadrangle, Fall River County, South Dakota. The Survey, 1957.