APA (7th ed.) Citation

Perman, R., Yue, M., & McGilvray, J. (1996). Natural resources and environmental economics. Longman.

Chicago Style (17th ed.) Citation

Perman, Roger, Ma Yue, and James McGilvray. Natural Resources and Environmental Economics. London: Longman, 1996.

MLA (9th ed.) Citation

Perman, Roger, et al. Natural Resources and Environmental Economics. Longman, 1996.