Willems, M. (2008). Are you ready to play outside? Hyperion Books for Children.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWillems, Mo. Are You Ready to Play Outside? New York: Hyperion Books for Children, 2008.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWillems, Mo. Are You Ready to Play Outside? Hyperion Books for Children, 2008.
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