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.
Atenció: Aquestes cites poden no estar 100% correctes.