Gray, T. W., & Mann, N. (2022). Engines: The inner workings of machines that move the world (First edition.). Black Dog & Leventhal Publishers, Hachette Book Group.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGray, Theodore W., और Nick Mann. Engines: The Inner Workings of Machines That Move the World. First edition. New York: Black Dog & Leventhal Publishers, Hachette Book Group, 2022.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGray, Theodore W., और Nick Mann. Engines: The Inner Workings of Machines That Move the World. First edition. Black Dog & Leventhal Publishers, Hachette Book Group, 2022.
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