Dyfyniad APA

(1973). last two million years: History of man. Readers Digest Association.

Dyfyniad Arddull Chicago

Last Two Million Years: History of Man. London: Readers Digest Association, 1973.

Dyfyniad MLA

Last Two Million Years: History of Man. Readers Digest Association, 1973.

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