Dyfyniad APA

Whitfield, P. (1993). Natural history of evolution. Doubleday.

Dyfyniad Arddull Chicago

Whitfield, Philip. Natural History of Evolution. London: Doubleday, 1993.

Dyfyniad MLA

Whitfield, Philip. Natural History of Evolution. Doubleday, 1993.

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