APA (7th ed.) Citation

Diment, W. H., & Urban, T. C. (1981). Average elevation map of the conterminous United States: (Gilluly averaging method). U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Diment, William H., and T. C. Urban. Average Elevation Map of the Conterminous United States: (Gilluly Averaging Method). Reston, Va.: U.S. Geological Survey, 1981.

MLA (8th ed.) Citation

Diment, William H., and T. C. Urban. Average Elevation Map of the Conterminous United States: (Gilluly Averaging Method). U.S. Geological Survey, 1981.