Gray, J. A. (2002). Forest concession policies and revenue systems: Country experience and policy changes for sustainable tropical forestry. World Bank.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGray, John Andrew. Forest Concession Policies and Revenue Systems: Country Experience and Policy Changes for Sustainable Tropical Forestry. Washington, D.C: World Bank, 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGray, John Andrew. Forest Concession Policies and Revenue Systems: Country Experience and Policy Changes for Sustainable Tropical Forestry. World Bank, 2002.
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