Não informado. (1999). The Polish Quarterly of International Affairs. Polish Institute of International Affairs.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The Polish Quarterly of International Affairs. Warszawa: Polish Institute of International Affairs, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The Polish Quarterly of International Affairs. Polish Institute of International Affairs, 1999.
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