Dyfyniad APA

Bird, W. (1991). The orgin of species revisited: The theories of evolution and of abrupt appearance. Regency.

Dyfyniad Arddull Chicago

Bird, W.R. The Orgin of Species Revisited: The Theories of Evolution and of Abrupt Appearance. Tennessee: Regency, 1991.

Dyfyniad MLA

Bird, W.R. The Orgin of Species Revisited: The Theories of Evolution and of Abrupt Appearance. Regency, 1991.

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