Richardson, K., & Barron, M. (2011). Greywalker: Greywalker series, book 1 (Unabridged.). Recorded Books Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRichardson, Kat, और Mia Barron. Greywalker: Greywalker Series, Book 1. Unabridged. Prince Frederick: Recorded Books Inc., 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRichardson, Kat, और Mia Barron. Greywalker: Greywalker Series, Book 1. Unabridged. Recorded Books Inc., 2011.
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