Krieger, E. (2018). Animal smackdown: Surprising animal matchups with surprising results. National Geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKrieger, Emily. Animal Smackdown: Surprising Animal Matchups with Surprising Results. Washington, D.C.: National Geographic, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKrieger, Emily. Animal Smackdown: Surprising Animal Matchups with Surprising Results. National Geographic, 2018.
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