APA (7th ed.) Citation

Simpson, H. E. (1973). Map showing areas of potential rockfalls in the Golden quadrangle, Jefferson County, Colorado. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Simpson, Howard E. Map Showing Areas of Potential Rockfalls in the Golden Quadrangle, Jefferson County, Colorado. Washington, D.C.: U.S. Geological Survey, 1973.

MLA (9th ed.) Citation

Simpson, Howard E. Map Showing Areas of Potential Rockfalls in the Golden Quadrangle, Jefferson County, Colorado. U.S. Geological Survey, 1973.