Παραπομπή APA

Burchfield, J. D. (1975). Lord Kelvin and the age of the earth. Macmillan.

Παραπομπή Chicago Style

Burchfield, Joe D. Lord Kelvin and the Age of the Earth. London: Macmillan, 1975.

Παραπομπή MLA

Burchfield, Joe D. Lord Kelvin and the Age of the Earth. Macmillan, 1975.