(2001). American Headway 1: (Workbook). Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoAmerican Headway 1: (Workbook). Oxford: Oxford University Press, 2001.
Deismireacht MLAAmerican Headway 1: (Workbook). Oxford: Oxford University Press, 2001.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.