Dyfyniad APA

Crawford, M. (1989). The driving force: Food, evolution, and the future. Heinmann.

Dyfyniad Arddull Chicago

Crawford, Michae. The Driving Force: Food, Evolution, and the Future. London: Heinmann, 1989.

Dyfyniad MLA

Crawford, Michae. The Driving Force: Food, Evolution, and the Future. Heinmann, 1989.

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