Underhill, N. (1987). Testing spoken language: A handbook of oral testing techniques. Cambridge University Press.
Dyfyniad Arddull ChicagoUnderhill, Nic. Testing Spoken Language: A Handbook of Oral Testing Techniques. Cambridge [Cambridgeshire] ; New York: Cambridge University Press, 1987.
Dyfyniad MLAUnderhill, Nic. Testing Spoken Language: A Handbook of Oral Testing Techniques. Cambridge University Press, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.