APA (7th ed.) Citation

Hudson, M. R., Turner, K. J., & Repetski, J. E. (2006). Geologic map of the Western Grove quadrangle, northwestern Arkansas (Version 1.0.). U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Hudson, Mark R., Kenzie J. Turner, and John E. Repetski. Geologic Map of the Western Grove Quadrangle, Northwestern Arkansas. Version 1.0. Denver, Colo.: U.S. Geological Survey, 2006.

MLA (9th ed.) Citation

Hudson, Mark R., et al. Geologic Map of the Western Grove Quadrangle, Northwestern Arkansas. Version 1.0. U.S. Geological Survey, 2006.