APA (7th ed.) Citation

Morton, D. M., Bovard, K. R., & Morton, G. (2003). Geologic map and digital database of the Romoland 7.5' quadrangle, Riverside County, California (Version 1.0.). U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Morton, Douglas M., Kelly R. Bovard, and G. Morton. Geologic Map and Digital Database of the Romoland 7.5' Quadrangle, Riverside County, California. Version 1.0. Menlo Park, CA.: U.S. Geological Survey, 2003.

MLA (9th ed.) Citation

Morton, Douglas M., et al. Geologic Map and Digital Database of the Romoland 7.5' Quadrangle, Riverside County, California. Version 1.0. U.S. Geological Survey, 2003.