APA (7th ed.) Citation

(2008). Average in-use emissions from heavy-duty trucks: Emission facts. United States Environmental Protection Agency, Office of Transportation and Air Quality.

Chicago Style (17th ed.) Citation

Average In-use Emissions from Heavy-duty Trucks: Emission Facts. [Washington, D.C.]: United States Environmental Protection Agency, Office of Transportation and Air Quality, 2008.

MLA (9th ed.) Citation

Average In-use Emissions from Heavy-duty Trucks: Emission Facts. United States Environmental Protection Agency, Office of Transportation and Air Quality, 2008.