Newton, R. G. (1993). What makes nature tick? Harvard University Press; Universities Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNewton, Roger G. What Makes Nature Tick? Cambridge, Mass. : India: Harvard University Press; Universities Press, 1993.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNewton, Roger G. What Makes Nature Tick? Harvard University Press; Universities Press, 1993.
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