Lua APA (7ú heag.)

Perman, R., Ma, Y., McGilvray, J., & Common, M. (2003). Natural resource and environmental economics (Third edition.). Pearson Education.

Lua i Stíl Chicago (17ú heag.)

Perman, Roger, Yue Ma, James McGilvray, agus Michael Common. Natural Resource and Environmental Economics. Third edition. New York: Pearson Education, 2003.

Lua MLA (8ú heag.)

Perman, Roger, et al. Natural Resource and Environmental Economics. Third edition. Pearson Education, 2003.

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