Markle, S. (2025). The great narwhal rescue: Saving the Arctic ocean's narwhals. Millbrook Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMarkle, Sandra. The Great Narwhal Rescue: Saving the Arctic Ocean's Narwhals. Minneapolis: Millbrook Press, 2025.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMarkle, Sandra. The Great Narwhal Rescue: Saving the Arctic Ocean's Narwhals. Millbrook Press, 2025.
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