(2015). Where's Walrus?: And Penguin? (First edition.). Scholastic Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWhere's Walrus?: And Penguin? First edition. New York: Scholastic Press, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWhere's Walrus?: And Penguin? First edition. Scholastic Press, 2015.
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