APA (7th ed.) Citation

Geological Survey (U.S.), Regional Applied Research Effort Program (U.S.), United States. Environmental Protection Agency. Region IX, United States. Natural Resources Conservation Service, California. Department of Fish and Wildlife, & Griffith, G. E. (2016). Ecoregions of California. U.S. Department of the Interior, U.S.Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Regional Applied Research Effort Program (U.S.), United States. Environmental Protection Agency. Region IX, United States. Natural Resources Conservation Service, California. Department of Fish and Wildlife, and Glenn E. Griffith. Ecoregions of California. Reston, Virginia: U.S. Department of the Interior, U.S.Geological Survey, 2016.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Ecoregions of California. U.S. Department of the Interior, U.S.Geological Survey, 2016.