Duncan, D. (2016). Speak to the devil (First mass market edition.). Tor.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDuncan, Dave. Speak to the Devil. First mass market edition. New York: Tor, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDuncan, Dave. Speak to the Devil. First mass market edition. Tor, 2016.
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