Irvine, M., & Cadman, M. (1999). Commercially speaking: Teacher's book. Oxford: Oxford University Press.
Dyfyniad Arddull ChicagoIrvine, Mark., và Marion Cadman. Commercially Speaking: Teacher's Book. Oxford: Oxford University Press, 1999.
Dyfyniad MLAIrvine, Mark., và Marion Cadman. Commercially Speaking: Teacher's Book. Oxford: Oxford University Press, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.