(1986). Headway workbook: Intermediate. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoHeadway Workbook: Intermediate. Oxford: Oxford University Press, 1986.
Deismireacht MLAHeadway Workbook: Intermediate. Oxford: Oxford University Press, 1986.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.