Halls, K. M., & Heller, J. (2015). Courageous canine and more true stories of amazing animal heroes (Unabridged.). Recorded Books Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHalls, Kelly Milner, और Johnny Heller. Courageous Canine and More True Stories of Amazing Animal Heroes. Unabridged. Prince Frederick: Recorded Books Inc., 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHalls, Kelly Milner, और Johnny Heller. Courageous Canine and More True Stories of Amazing Animal Heroes. Unabridged. Recorded Books Inc., 2015.
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