Mass, W. (2014). Pi in the sky (First paperback edition.). Little, Brown and Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMass, Wendy. Pi in the Sky. First paperback edition. New York: Little, Brown and Company, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMass, Wendy. Pi in the Sky. First paperback edition. Little, Brown and Company, 2014.
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