(1997). Emission standards reference guide for heavy-duty and nonroad engines. United States Environmental Protection Agency, Air and Radiation.
Chicago Style (17th ed.) CitationEmission Standards Reference Guide for Heavy-duty and Nonroad Engines. [Washington, D.C.]: United States Environmental Protection Agency, Air and Radiation, 1997.
MLA (9th ed.) CitationEmission Standards Reference Guide for Heavy-duty and Nonroad Engines. United States Environmental Protection Agency, Air and Radiation, 1997.
Warning: These citations may not always be 100% accurate.