Wilson, W. (2007). Fifty - fifty: A speaking and listening course. Oxford University Press.
Dyfyniad Arddull ChicagoWilson, Warren. Fifty - Fifty: A Speaking and Listening Course. Oxford University Press, 2007.
Dyfyniad MLAWilson, Warren. Fifty - Fifty: A Speaking and Listening Course. Oxford University Press, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.