Groc, I. (2019). Gone is gone: Wildlife under threat. Orca Book Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGroc, Isabelle. Gone Is Gone: Wildlife Under Threat. [Victoria, British Columbia]: Orca Book Publishers, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGroc, Isabelle. Gone Is Gone: Wildlife Under Threat. Orca Book Publishers, 2019.
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