Willems, M. (2021). Opposites abstract (First edition.). Hyperion Books for Children.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWillems, Mo. Opposites Abstract. First edition. New York: Hyperion Books for Children, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWillems, Mo. Opposites Abstract. First edition. Hyperion Books for Children, 2021.
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