Lawson, L. (1997). Staying ahead: Video activity book. Cambridge: Cambridge University Press.
Dyfyniad Arddull ChicagoLawson, Lynda. Staying Ahead: Video Activity Book. Cambridge: Cambridge University Press, 1997.
Dyfyniad MLALawson, Lynda. Staying Ahead: Video Activity Book. Cambridge: Cambridge University Press, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.