Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.