Wirth. The Barbarian Principle. State University of New York Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWirth. The Barbarian Principle. State University of New York Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWirth. The Barbarian Principle. State University of New York Press.
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