(1973). last two million years: History of man. Readers Digest Association.
Dyfyniad Arddull ChicagoLast Two Million Years: History of Man. London: Readers Digest Association, 1973.
Dyfyniad MLALast Two Million Years: History of Man. Readers Digest Association, 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.