Burchfield, J. D. (1975). Lord Kelvin and the age of the earth. Science History Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBurchfield, Joe D. Lord Kelvin and the Age of the Earth. New York: Science History Publications, 1975.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBurchfield, Joe D. Lord Kelvin and the Age of the Earth. Science History Publications, 1975.
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