Swan, M. (1987). The Cambridge English course 3: Test book. Cambridge: Cambridge University Press.
Dyfyniad Arddull ChicagoSwan, Michael. The Cambridge English Course 3: Test Book. Cambridge: Cambridge University Press, 1987.
Dyfyniad MLASwan, Michael. The Cambridge English Course 3: Test Book. Cambridge: Cambridge University Press, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.