Mason, R. (2003). Speaking on special occasions. Hodder.
Dyfyniad Arddull ChicagoMason, Roger. Speaking on Special Occasions. London: Hodder, 2003.
Dyfyniad MLAMason, Roger. Speaking on Special Occasions. Hodder, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.