Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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