Cita APA (7th ed.)

Ackerman, B. A., & Hassler, W. T. (1981). Clean coal/dirty air: Or how the Clean Air Act became a multibillion-dollar bail-out for high-sulfur coal producers and what should be done about it. Yale University Press.

Cita Chicago (17th ed.)

Ackerman, Bruce A., i William T. Hassler. Clean Coal/dirty Air: Or How the Clean Air Act Became a Multibillion-dollar Bail-out for High-sulfur Coal Producers and What Should Be Done About It. New Haven: Yale University Press, 1981.

Cita MLA (9th ed.)

Ackerman, Bruce A., i William T. Hassler. Clean Coal/dirty Air: Or How the Clean Air Act Became a Multibillion-dollar Bail-out for High-sulfur Coal Producers and What Should Be Done About It. Yale University Press, 1981.