Richardson, K., & Barron, M. (2010). Vanished: Greywalker series, book 4 (Unabridged.). Recorded Books Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRichardson, Kat, और Mia Barron. Vanished: Greywalker Series, Book 4. Unabridged. Prince Frederick: Recorded Books Inc., 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRichardson, Kat, और Mia Barron. Vanished: Greywalker Series, Book 4. Unabridged. Recorded Books Inc., 2010.
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