Bravo-Ortega, C., & De Gregorio, J. (2005). The relative richness of the poorn: Natural resources, human capital, and economic growth. World Bank.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBravo-Ortega, Claudio, और Jose De Gregorio. The Relative Richness of the Poorn: Natural Resources, Human Capital, and Economic Growth. Washington, D.C: World Bank, 2005.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBravo-Ortega, Claudio, और Jose De Gregorio. The Relative Richness of the Poorn: Natural Resources, Human Capital, and Economic Growth. World Bank, 2005.
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