APA (7th ed.) Citation

Ellen, S. D., & Wentworth, C. M. (1995). Hillside materials and slopes of the San Francisco Bay region, California. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Ellen, Stephen D., and Carl M. Wentworth. Hillside Materials and Slopes of the San Francisco Bay Region, California. Washington: U.S. Department of the Interior, U.S. Geological Survey, 1995.

MLA (9th ed.) Citation

Ellen, Stephen D., and Carl M. Wentworth. Hillside Materials and Slopes of the San Francisco Bay Region, California. U.S. Department of the Interior, U.S. Geological Survey, 1995.