APA (7th ed.) Citation

Perman, R., Common, M., Ma, Y., & McGilvray, J. (1999). Natural resource and environmental economics. Longman.

Chicago Style (17th ed.) Citation

Perman, Roger, Michael Common, Yue Ma, and James McGilvray. Natural Resource and Environmental Economics. London: Longman, 1999.

MLA (8th ed.) Citation

Perman, Roger, et al. Natural Resource and Environmental Economics. Longman, 1999.