Cita APA (7a ed.)

Perman, R. (2011). Natural resource and environmental economics (Fourth edition.). Addison Wesley.

Cita Chicago Style (17a ed.)

Perman, Roger. Natural Resource and Environmental Economics. Fourth edition. Harlow, England: Addison Wesley, 2011.

Cita MLA (8a ed.)

Perman, Roger. Natural Resource and Environmental Economics. Fourth edition. Addison Wesley, 2011.