Rooney, D. (2021). About time: A history of civilization in twelve clocks (First American edition.). W.W. Norton & Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRooney, David. About Time: A History of Civilization in Twelve Clocks. First American edition. New York: W.W. Norton & Company, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRooney, David. About Time: A History of Civilization in Twelve Clocks. First American edition. W.W. Norton & Company, 2021.
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