Davies, N., & Layton, N. (2009). Extreme animals: The toughest creatures on Earth (1st U.S. pbk. ed.). Candlewick Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDavies, Nicola, और Neal Layton. Extreme Animals: The Toughest Creatures on Earth. 1st U.S. pbk. ed. Somerville, Mass.: Candlewick Press, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDavies, Nicola, और Neal Layton. Extreme Animals: The Toughest Creatures on Earth. 1st U.S. pbk. ed. Candlewick Press, 2009.
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