Dyfyniad APA

Spengler, O. (1980). The decline of the West. London: Geoge Allen & Urwin.

Dyfyniad Arddull Chicago

Spengler, Oswald. The Decline of the West. London: Geoge Allen & Urwin, 1980.

Dyfyniad MLA

Spengler, Oswald. The Decline of the West. London: Geoge Allen & Urwin, 1980.

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