Stamper, P. (2020). The gravity of us. Bloomsbury.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रStamper, Phil. The Gravity of Us. New York: Bloomsbury, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रStamper, Phil. The Gravity of Us. Bloomsbury, 2020.
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