Spengler, O. (1962). The decline of the West. London: Geoge Allen & Urwin.
Trích dẫn kiểu ChicagoSpengler, Oswald. The Decline of the West. London: Geoge Allen & Urwin, 1962.
Deismireacht MLASpengler, Oswald. The Decline of the West. London: Geoge Allen & Urwin, 1962.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.