APA

Sowell E., American Petroleum Institute A. & Sowell E. (1984). The economic approach to the attainment of air quality standards. Washington: American Petroleum Institute, API.

Chicago

Sowell Elizabeth, American Petroleum Institute API and Sowell Elizabeth. 1984. The economic approach to the attainment of air quality standards. Washington: American Petroleum Institute, API.

Harvard

Sowell E., American Petroleum Institute A. and Sowell E. (1984). The economic approach to the attainment of air quality standards. Washington: American Petroleum Institute, API.

MLA

Sowell Elizabeth, American Petroleum Institute API and Sowell Elizabeth. The economic approach to the attainment of air quality standards. Washington: American Petroleum Institute, API. 1984.