Underhill, A. (2005). Sound foundations: Learning and teaching pronunciation. Oxford: Macmillan.
Trích dẫn kiểu ChicagoUnderhill, Adrian. Sound Foundations: Learning and Teaching Pronunciation. Oxford: Macmillan, 2005.
Deismireacht MLAUnderhill, Adrian. Sound Foundations: Learning and Teaching Pronunciation. Oxford: Macmillan, 2005.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.