APA (7th ed.) Citation

Geological Survey (U.S.), Denson, N. M., Pierson, C. T., & Gundy, W. D. (1994). Geologic map showing thickness of sedimentary rocks from ground surface to the top of the upper Cretaceous Pierre Shale in the north half of the Powder River Basin, southeastern Montana and northeastern Wyoming. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), N. M. Denson, Charles Thomas Pierson, and W. D. Gundy. Geologic Map Showing Thickness of Sedimentary Rocks from Ground Surface to the Top of the Upper Cretaceous Pierre Shale in the North Half of the Powder River Basin, Southeastern Montana and Northeastern Wyoming. Reston, VA: The Survey, 1994.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geologic Map Showing Thickness of Sedimentary Rocks from Ground Surface to the Top of the Upper Cretaceous Pierre Shale in the North Half of the Powder River Basin, Southeastern Montana and Northeastern Wyoming. The Survey, 1994.