Okrasa, W. (1999). The dynamics of poverty and the effectiveness of Poland's safety net, 1993-96. World Bank.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOkrasa, Wlodzimierz. The Dynamics of Poverty and the Effectiveness of Poland's Safety Net, 1993-96. Washington, D.C: World Bank, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOkrasa, Wlodzimierz. The Dynamics of Poverty and the Effectiveness of Poland's Safety Net, 1993-96. World Bank, 1999.
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