Robert Allen. (2003). The penguin English dictionary. England: Penguin Books.
Trích dẫn kiểu ChicagoRobert Allen. The Penguin English Dictionary. England: Penguin Books, 2003.
Deismireacht MLARobert Allen. The Penguin English Dictionary. England: Penguin Books, 2003.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.