Vogan. Keepers of the Flame. University of Illinois Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVogan. Keepers of the Flame. University of Illinois Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVogan. Keepers of the Flame. University of Illinois Press.
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