Westling. The Logos of the Living World. Fordham University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWestling. The Logos of the Living World. Fordham University Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWestling. The Logos of the Living World. Fordham University Press.
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