Citazione Stile APA (7a Edizione)

Freeman, A. M. (1971). The economics of pollution control and environmental quality. General Learning Press.

Citazione stile Chigago Style (17a edizione)

Freeman, A. Myrick. The Economics of Pollution Control and Environmental Quality. New York: General Learning Press, 1971.

Citatione MLA (8a ed.)

Freeman, A. Myrick. The Economics of Pollution Control and Environmental Quality. General Learning Press, 1971.