APA (7th ed.) Citation

Geological Survey (U.S.), University of Nebraska--Lincoln. Conservation and Survey Division, Swinehart, J. B., Diffendal, R. F., & Swisher, C. C. (1995). Geologic map of Morrill County, Nebraska. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), University of Nebraska--Lincoln. Conservation and Survey Division, James B. Swinehart, R. F. Diffendal, and C. C. Swisher. Geologic Map of Morrill County, Nebraska. Reston, VA: The Survey, 1995.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geologic Map of Morrill County, Nebraska. The Survey, 1995.