Sloan. Darwin in the Twenty-First Century. University of Notre Dame Press.
Dyfyniad Arddull ChicagoSloan. Darwin in the Twenty-First Century. University of Notre Dame Press.
Dyfyniad MLASloan. Darwin in the Twenty-First Century. University of Notre Dame Press.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.