Dyfyniad APA

Richards, J. C. (2013). Four corners: Student's book. Cambridge: Cambridge University Press.

Dyfyniad Arddull Chicago

Richards, Jack C. Four Corners: Student's Book. Cambridge: Cambridge University Press, 2013.

Dyfyniad MLA

Richards, Jack C. Four Corners: Student's Book. Cambridge: Cambridge University Press, 2013.

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