APA (7th ed.) Citation

Prostka, H. J., & Seiders, V. M. (1968). Geologic map of the Leatherwood quadrangle, southeastern Kentucky. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Prostka, Harold J., and Victor M. Seiders. Geologic Map of the Leatherwood Quadrangle, Southeastern Kentucky. Washington, D.C.: U.S. Geological Survey, 1968.

MLA (9th ed.) Citation

Prostka, Harold J., and Victor M. Seiders. Geologic Map of the Leatherwood Quadrangle, Southeastern Kentucky. U.S. Geological Survey, 1968.