APA (7th ed.) Citation

Richmond, G. M., & Waldrop, H. A. (1972). Surficial geologic map of the Pelican Cone quadrangle, Yellowstone National Park and adjoining area, Wyoming. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Richmond, Gerald Martin, and Henry A. Waldrop. Surficial Geologic Map of the Pelican Cone Quadrangle, Yellowstone National Park and Adjoining Area, Wyoming. Washington, D.C.: U.S. Geological Survey, 1972.

MLA (8th ed.) Citation

Richmond, Gerald Martin, and Henry A. Waldrop. Surficial Geologic Map of the Pelican Cone Quadrangle, Yellowstone National Park and Adjoining Area, Wyoming. U.S. Geological Survey, 1972.