Willems, M. (2010). Time to sleep, Sheep the sheep! (First edition.). Balzer + Bray, an imprint of HarperCollinsPublishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWillems, Mo. Time to Sleep, Sheep the Sheep! First edition. New York, NY: Balzer + Bray, an imprint of HarperCollinsPublishers, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWillems, Mo. Time to Sleep, Sheep the Sheep! First edition. Balzer + Bray, an imprint of HarperCollinsPublishers, 2010.
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