Hurd, D. L., Kipling, J. J., & Schwartz, G. I. (1964). The origins and growth of physical science. Penguin Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHurd, David Leonard, J. J. Kipling, और George I. Schwartz. The Origins and Growth of Physical Science. Baltimore: Penguin Books, 1964.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHurd, David Leonard, et al. The Origins and Growth of Physical Science. Penguin Books, 1964.