Houston, K. (2023). Empire of the sum: The rise and reign of the pocket calculator (First edition.). W.W. Norton & Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHouston, Keith. Empire of the Sum: The Rise and Reign of the Pocket Calculator. First edition. New York, NY: W.W. Norton & Company, 2023.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHouston, Keith. Empire of the Sum: The Rise and Reign of the Pocket Calculator. First edition. W.W. Norton & Company, 2023.
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