World Bank. (2009). Global economic prospects: Commodities at the crossroads. World Bank.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorld Bank. Global Economic Prospects: Commodities at the Crossroads. Washington, DC: World Bank, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWorld Bank. Global Economic Prospects: Commodities at the Crossroads. World Bank, 2009.
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