Waal, F. B. M. d. (2019). Mama's last hug: Animal emotions and what they tell us about ourselves (First edition.). W.W. Norton & Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWaal, F. B. M. de. Mama's Last Hug: Animal Emotions and What They Tell Us About Ourselves. First edition. New York: W.W. Norton & Company, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWaal, F. B. M. de. Mama's Last Hug: Animal Emotions and What They Tell Us About Ourselves. First edition. W.W. Norton & Company, 2019.
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