Oxenden, C. (1998). English file: Student's book. Oxford: Oxford University Press.
Dyfyniad Arddull ChicagoOxenden, Clive. English File: Student's Book. Oxford: Oxford University Press, 1998.
Dyfyniad MLAOxenden, Clive. English File: Student's Book. Oxford: Oxford University Press, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.