APA (7th ed.) Citation

Geological Survey (U.S.), Denson, N. M., Pierson, C. T., & Grundy, W. D. (1995). Geologic map showing thickness of sedimentary rocks from the ground surface to the top of the upper Cretaceous Pierre Shale in the south half of the Powder River Basin, northeastern Wyoming and adjacent areas. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), N. M. Denson, Charles Thomas Pierson, and W. D. Grundy. Geologic Map Showing Thickness of Sedimentary Rocks from the Ground Surface to the Top of the Upper Cretaceous Pierre Shale in the South Half of the Powder River Basin, Northeastern Wyoming and Adjacent Areas. Reston, VA: The Survey, 1995.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geologic Map Showing Thickness of Sedimentary Rocks from the Ground Surface to the Top of the Upper Cretaceous Pierre Shale in the South Half of the Powder River Basin, Northeastern Wyoming and Adjacent Areas. The Survey, 1995.