O'Dell, F. (2002). Objective CAE: Self-study. Cambridge: Cambridge University Press.
Dyfyniad Arddull ChicagoO'Dell, Felicity. Objective CAE: Self-study. Cambridge: Cambridge University Press, 2002.
Dyfyniad MLAO'Dell, Felicity. Objective CAE: Self-study. Cambridge: Cambridge University Press, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.