APA ציטוט

Thomas, J. M., & Callan,Scott. (2009). Environmental economics (India ed.). Cengage Learning.

Chicago Style (17th ed.) Citation

Thomas, Janet M., and Callan,Scott. Environmental Economics. India ed. New Dehli: Cengage Learning, 2009.

ציטוט MLA

Thomas, Janet M., and Callan,Scott. Environmental Economics. India ed. Cengage Learning, 2009.