APA ציטוט

Perman, R. (2011). Natural resource and environmental economics (4th ed.). Pearson Education.

Chicago Style (17th ed.) Citation

Perman, Roger. Natural Resource and Environmental Economics. 4th ed. Harlow, Essex, Eng: Pearson Education, 2011.

ציטוט MLA

Perman, Roger. Natural Resource and Environmental Economics. 4th ed. Pearson Education, 2011.