Polak, P. (2009). Out of poverty: What works when traditional approaches fail. Harper - Collins.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPolak, Paul. Out of Poverty: What Works When Traditional Approaches Fail. Harper - Collins, 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPolak, Paul. Out of Poverty: What Works When Traditional Approaches Fail. Harper - Collins, 2009.
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