APA (7th ed.) Citation

(2010). Greenhouse gas emissions model (GEM) user guide. U.S. Environmental Protection Agency, Office of Transportation and Air Quality, Assessment and Standards Division.

Chicago Style (17th ed.) Citation

Greenhouse Gas Emissions Model (GEM) User Guide. [Washington, D.C.]: U.S. Environmental Protection Agency, Office of Transportation and Air Quality, Assessment and Standards Division, 2010.

MLA (9th ed.) Citation

Greenhouse Gas Emissions Model (GEM) User Guide. U.S. Environmental Protection Agency, Office of Transportation and Air Quality, Assessment and Standards Division, 2010.