Leff, G. (1968). Paris and Oxford universities in the thirteenth and fourteenth centuries: An institutional and intellectual history. John Wiley and Sons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLeff, Gordon. Paris and Oxford Universities in the Thirteenth and Fourteenth Centuries: An Institutional and Intellectual History. John Wiley and Sons, 1968.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLeff, Gordon. Paris and Oxford Universities in the Thirteenth and Fourteenth Centuries: An Institutional and Intellectual History. John Wiley and Sons, 1968.
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