Cita APA

Perman,Roger. (1999). Natural resource and environmental economics. Longman.

Chicago Edition Citation

Perman,Roger. Natural Resource and Environmental Economics. London: Longman, 1999.

Cita MLA

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

Atenció: Aquestes cites poden no estar 100% correctes.