Parker, M. B., & Kelly, J. (2010). A paddling of ducks: Animals in groups from A to Z. Tonawanda, N.Y. : Kids Can Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रParker, Marjorie Blain, और Joseph Kelly. A Paddling of Ducks: Animals in Groups from A to Z. Toronto, Ont: Tonawanda, N.Y. : Kids Can Press, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रParker, Marjorie Blain, और Joseph Kelly. A Paddling of Ducks: Animals in Groups from A to Z. Tonawanda, N.Y. : Kids Can Press, 2010.
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