Berglund. Castle and Cathedral. Central European University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBerglund. Castle and Cathedral. Central European University Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBerglund. Castle and Cathedral. Central European University Press.
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