Robert H Dott. (1981). Evolution of the earth. New York: McGraw-Hill.
Dyfyniad Arddull ChicagoRobert H Dott. Evolution of the Earth. New York: McGraw-Hill, 1981.
Dyfyniad MLARobert H Dott. Evolution of the Earth. New York: McGraw-Hill, 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.