Alexander, A. (2019). Proof!: How the world became geometrical (First edition.). Scientific American : Farrar, Straus and Giroux.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAlexander, Amir. Proof!: How the World Became Geometrical. First edition. New York: Scientific American : Farrar, Straus and Giroux, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAlexander, Amir. Proof!: How the World Became Geometrical. First edition. Scientific American : Farrar, Straus and Giroux, 2019.
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