United States. Environmental Protection Agency. Office of Transportation and Air Quality. (2002). Exhaust emission factors for nonroad engine modeling--spark ignition. Assessment and Modeling Division, Office of Transportation and Air Quality, U.S. Environmental Protection Agency.
Chicago Style (17th ed.) CitationUnited States. Environmental Protection Agency. Office of Transportation and Air Quality. Exhaust Emission Factors for Nonroad Engine Modeling--spark Ignition. [Washington, D.C.]: Assessment and Modeling Division, Office of Transportation and Air Quality, U.S. Environmental Protection Agency, 2002.
MLA (9th ed.) CitationUnited States. Environmental Protection Agency. Office of Transportation and Air Quality. Exhaust Emission Factors for Nonroad Engine Modeling--spark Ignition. Assessment and Modeling Division, Office of Transportation and Air Quality, U.S. Environmental Protection Agency, 2002.