Gratz, A., & Helquist, B. (2016). The monster war: A League of Seven novel (First edition: July 2016.). Starscape/A Tom Doherty Associates book.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGratz, Alan, और Brett Helquist. The Monster War: A League of Seven Novel. First edition: July 2016. New York: Starscape/A Tom Doherty Associates book, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGratz, Alan, और Brett Helquist. The Monster War: A League of Seven Novel. First edition: July 2016. Starscape/A Tom Doherty Associates book, 2016.
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