Dyfyniad APA

Martin, J., & Peter May; Jackie Martin. (1999). First Certificate Knockout. Oxford: Oxford University Press.

Dyfyniad Arddull Chicago

Martin, Jackie, và Peter May; Jackie Martin. First Certificate Knockout. Oxford: Oxford University Press, 1999.

Dyfyniad MLA

Martin, Jackie, và Peter May; Jackie Martin. First Certificate Knockout. Oxford: Oxford University Press, 1999.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.