Wheeler, J. A. (1990). A journey into gravity and spacetime. Scientific American Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWheeler, John Archibald. A Journey into Gravity and Spacetime. New York: Scientific American Library, 1990.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWheeler, John Archibald. A Journey into Gravity and Spacetime. Scientific American Library, 1990.
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