Green, B. D., & Nix, R. G. (2006). Geothermal, the energy under our feet: Geothermal resource estimates for the United States. National Renewable Energy Laborary.
Chicago Style (17th ed.) CitationGreen, Bruce D., and R. Gerald Nix. Geothermal, the Energy Under Our Feet: Geothermal Resource Estimates for the United States. Golden, Colo.: National Renewable Energy Laborary, 2006.
MLA (9th ed.) CitationGreen, Bruce D., and R. Gerald Nix. Geothermal, the Energy Under Our Feet: Geothermal Resource Estimates for the United States. National Renewable Energy Laborary, 2006.
Warning: These citations may not always be 100% accurate.