Perman, R., Ma, Y., Common, M., Maddison, D., & McGlivray, J. (2011). Natural resource and environmental economics (Forth edition.). Pearson Addison Wesley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPerman, Roger, Yue Ma, Michael Common, David Maddison, और James McGlivray. Natural Resource and Environmental Economics. Forth edition. Harlow, Essex ; New York: Pearson Addison Wesley, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPerman, Roger, et al. Natural Resource and Environmental Economics. Forth edition. Pearson Addison Wesley, 2011.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.