APA (7th ed.) Citation

(2004). Proposed changes to test procedures for nonroad engines and heavy-duty highway engines. United States Environmental Protection Agency, Office of Transportation and Air Quality.

Chicago Style (17th ed.) Citation

Proposed Changes to Test Procedures for Nonroad Engines and Heavy-duty Highway Engines. [Washington, DC]: United States Environmental Protection Agency, Office of Transportation and Air Quality, 2004.

MLA (9th ed.) Citation

Proposed Changes to Test Procedures for Nonroad Engines and Heavy-duty Highway Engines. United States Environmental Protection Agency, Office of Transportation and Air Quality, 2004.