Showalter, G., & Bellmore, M. (2017). The darkest promise: Lords of the underworld series, book 13 (Unabridged.). Recorded Books Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रShowalter, Gena, और Max Bellmore. The Darkest Promise: Lords of the Underworld Series, Book 13. Unabridged. Prince Frederick: Recorded Books Inc., 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रShowalter, Gena, और Max Bellmore. The Darkest Promise: Lords of the Underworld Series, Book 13. Unabridged. Recorded Books Inc., 2017.
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