Dyfyniad APA

Simpson, G. G. (1949). The meaning of evolution: A study of the history of life and of its significance for man. Yale Univ. Press.

Dyfyniad Arddull Chicago

Simpson, George Gaylord. The Meaning of Evolution: A Study of the History of Life and of Its Significance for Man. New Haven: Yale Univ. Press, 1949.

Dyfyniad MLA

Simpson, George Gaylord. The Meaning of Evolution: A Study of the History of Life and of Its Significance for Man. Yale Univ. Press, 1949.

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