Perman, R., Ma, Y., & McGilvray, J. (2003). Natural resource and environmental economics (3rd ed.). Pearson Education.
Citace podle Chicago (17th ed.)Perman, Roger, Yue Ma, a James McGilvray. Natural Resource and Environmental Economics. 3rd ed. Harlow, Essex: Pearson Education, 2003.
Citace podle MLA (9th ed.)Perman, Roger, et al. Natural Resource and Environmental Economics. 3rd ed. Pearson Education, 2003.
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