Strohmeyer, S., & McCulloh, B. (2003). Bubbles in trouble: Bubbles yablonsky series, book 2 (Unabridged.). Recorded Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रStrohmeyer, Sarah, और Barbara McCulloh. Bubbles in Trouble: Bubbles Yablonsky Series, Book 2. Unabridged. Prince Frederick: Recorded Books, 2003.
एमएलए (8वां संस्करण) प्रशस्ति पत्रStrohmeyer, Sarah, और Barbara McCulloh. Bubbles in Trouble: Bubbles Yablonsky Series, Book 2. Unabridged. Recorded Books, 2003.
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