Mass, W. (2013). Pi in the sky (First edition.). Little, Brown and Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMass, Wendy. Pi in the Sky. First edition. New York: Little, Brown and Company, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMass, Wendy. Pi in the Sky. First edition. Little, Brown and Company, 2013.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.