APA (7th ed.) Citation

(1999). Proposed "tier 2" emission standards for vehicles and gasoline sulfur standards for refineries. United States Environmental Protection Agency, Air and Radiation, Office of Mobile Sources.

Chicago Style (17th ed.) Citation

Proposed "Tier 2" Emission Standards for Vehicles and Gasoline Sulfur Standards for Refineries. Ann Arbor, MI: United States Environmental Protection Agency, Air and Radiation, Office of Mobile Sources, 1999.

MLA (9th ed.) Citation

Proposed "Tier 2" Emission Standards for Vehicles and Gasoline Sulfur Standards for Refineries. United States Environmental Protection Agency, Air and Radiation, Office of Mobile Sources, 1999.