Gruber, H. E. (1981). Darwin on man: A psychological study of scientific creativity. University of Chicago Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGruber, Howard E. Darwin on Man: A Psychological Study of Scientific Creativity. University of Chicago Press, 1981.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGruber, Howard E. Darwin on Man: A Psychological Study of Scientific Creativity. University of Chicago Press, 1981.
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