APA (7th ed.) Citation

Burchfield, J. D. (1975). Lord Kelvin and the age of the earth. Science History Publications.

Chicago Style (17th ed.) Citation

Burchfield, Joe D. Lord Kelvin and the Age of the Earth. New York: Science History Publications, 1975.

MLA (9th ed.) Citation

Burchfield, Joe D. Lord Kelvin and the Age of the Earth. Science History Publications, 1975.