Berns, G. (2024). Cowpuppy: An unexpected friendship and a scientist's journey into the secret world of cows. Harper Horizon.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBerns, Gregory. Cowpuppy: An Unexpected Friendship and a Scientist's Journey into the Secret World of Cows. New York: Harper Horizon, 2024.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBerns, Gregory. Cowpuppy: An Unexpected Friendship and a Scientist's Journey into the Secret World of Cows. Harper Horizon, 2024.
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