Cita APA (7th ed.)

Perman, R., Ma, Y., Common, M., Maddison, D., & McGlivray, J. (2011). Natural resource and environmental economics (Forth edition.). Pearson Addison Wesley.

Cita Chicago (17th ed.)

Perman, Roger, Yue Ma, Michael Common, David Maddison, i James McGlivray. Natural Resource and Environmental Economics. Forth edition. Harlow, Essex ; New York: Pearson Addison Wesley, 2011.

Cita MLA (8th ed.)

Perman, Roger, et al. Natural Resource and Environmental Economics. Forth edition. Pearson Addison Wesley, 2011.