Cita APA (7th ed.)

Freeman, A. M., Haveman, R. H., & Kneese, A. V. (1973). The economics of environmental policy. Wiley.

Cita Chicago (17th ed.)

Freeman, A. Myrick, Robert H. Haveman, i Allen V. Kneese. The Economics of Environmental Policy. New York: Wiley, 1973.

Cita MLA (9th ed.)

Freeman, A. Myrick, et al. The Economics of Environmental Policy. Wiley, 1973.