Grumley, M. C., & Brick, S. (2019). Leap: Breakthrough series, book 2 (Unabridged.). Recorded Books Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGrumley, Michael C., और Scott Brick. Leap: Breakthrough Series, Book 2. Unabridged. Prince Frederick: Recorded Books Inc., 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGrumley, Michael C., और Scott Brick. Leap: Breakthrough Series, Book 2. Unabridged. Recorded Books Inc., 2019.
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