Sanford, G. (1999). Poland: The conquest of history. Harwood Academic Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSanford, George. Poland: The Conquest of History. Australia: Harwood Academic Publishers, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSanford, George. Poland: The Conquest of History. Harwood Academic Publishers, 1999.
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