McCaffrey, A., & Ramirez, R. (2006). Changelings: Twins of petaybee series, book 1 (Unabridged.). Recorded Books Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMcCaffrey, Anne, और Robert Ramirez. Changelings: Twins of Petaybee Series, Book 1. Unabridged. Prince Frederick: Recorded Books Inc., 2006.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMcCaffrey, Anne, और Robert Ramirez. Changelings: Twins of Petaybee Series, Book 1. Unabridged. Recorded Books Inc., 2006.
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