Waddell, M. (1988). Can't you sleep, little bear?
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWaddell, Martin. Can't You Sleep, Little Bear? Candlewick Press, 1988.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWaddell, Martin. Can't You Sleep, Little Bear? 1988.
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