Stewart, A., & Moore, C. (2019). Kopp sisters on the march: Kopp sisters series, book 5 (Unabridged.). Recorded Books Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रStewart, Amy, और Christina Moore. Kopp Sisters on the March: Kopp Sisters Series, Book 5. Unabridged. Prince Frederick: Recorded Books Inc., 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रStewart, Amy, और Christina Moore. Kopp Sisters on the March: Kopp Sisters Series, Book 5. Unabridged. Recorded Books Inc., 2019.
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