Perman, R., Ma, Y., McGilvray, J., & Common, M. (2003). Natural resource and environmental economics (Third edition.). Pearson Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPerman, Roger, Yue Ma, James McGilvray, और Michael Common. Natural Resource and Environmental Economics. Third edition. New York: Pearson Education, 2003.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPerman, Roger, et al. Natural Resource and Environmental Economics. Third edition. Pearson Education, 2003.
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