Brett, P. V., & Bradbury, P. (2015). The skull throne: Demon cycle series, book 4 (Unabridged.). Recorded Books Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBrett, Peter V., और Pete Bradbury. The Skull Throne: Demon Cycle Series, Book 4. Unabridged. Prince Frederick: Recorded Books Inc., 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBrett, Peter V., और Pete Bradbury. The Skull Throne: Demon Cycle Series, Book 4. Unabridged. Recorded Books Inc., 2015.
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