Steig, W., & McDonough, J. (2017). Sylvester and the magic pebble (Unabridged.). Recorded Books Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSteig, William, और John McDonough. Sylvester and the Magic Pebble. Unabridged. Prince Frederick: Recorded Books Inc., 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSteig, William, और John McDonough. Sylvester and the Magic Pebble. Unabridged. Recorded Books Inc., 2017.
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