APA (7th ed.) Citation

Smith, D. A. (1979). Portland study element. United States Environmental Protection Agency, Motor Vehicle Emission Lab.

Chicago Style (17th ed.) Citation

Smith, David A. Portland Study Element. Ann Arbor, Michigan: United States Environmental Protection Agency, Motor Vehicle Emission Lab, 1979.

MLA (9th ed.) Citation

Smith, David A. Portland Study Element. United States Environmental Protection Agency, Motor Vehicle Emission Lab, 1979.

Warning: These citations may not always be 100% accurate.