Dyfyniad APA

Obee, B. (1998). Cambridge first certificate: Grammar and usage. Cambridge University Press.

Dyfyniad Arddull Chicago

Obee, Bob. Cambridge First Certificate: Grammar and Usage. Cambridge: Cambridge University Press, 1998.

Dyfyniad MLA

Obee, Bob. Cambridge First Certificate: Grammar and Usage. Cambridge University Press, 1998.

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