Martin J. Jackie & May P. Peter. (2003). Knockout. First Certificate: Workbook with key and tapescripts (5th ed.). Oxford, Oxford University Press, 2003.
Dyfyniad Arddull ChicagoMartin J. Jackie and May P. Peter. Knockout. First Certificate: Workbook with Key and Tapescripts. 5th ed. Oxford, Oxford University Press, 2003, 2003.
Dyfyniad MLAMartin J. Jackie and May P. Peter. Knockout. First Certificate: Workbook with Key and Tapescripts. 5th ed. Oxford, Oxford University Press, 2003, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.