Sargent, B. (2005). How heavy is it? Children's Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSargent, Brian. How Heavy Is It? New York: Children's Press, 2005.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSargent, Brian. How Heavy Is It? Children's Press, 2005.
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