P, B., & Zingarelli, T. (2016). Drop the rock: Removing character defects: steps six and seven (2.). Recorded Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रP, Bill, और Tom Zingarelli. Drop the Rock: Removing Character Defects: Steps Six and Seven. 2. Prince Frederick: Recorded Books, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रP, Bill, और Tom Zingarelli. Drop the Rock: Removing Character Defects: Steps Six and Seven. 2. Recorded Books, 2016.
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