McCafferty, K., & Holmes, R. (2013). The gray ghost murders: Sean stranahan mysteries series, book 2 (Unabridged.). Recorded Books Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMcCafferty, Keith, और Rick Holmes. The Gray Ghost Murders: Sean Stranahan Mysteries Series, Book 2. Unabridged. Prince Frederick: Recorded Books Inc., 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMcCafferty, Keith, और Rick Holmes. The Gray Ghost Murders: Sean Stranahan Mysteries Series, Book 2. Unabridged. Recorded Books Inc., 2013.
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