Naterop, B. J. (2004). Telephoning in English (3rd.ed.). Cambridge University Press.
Dyfyniad Arddull ChicagoNaterop, B. Jean. Telephoning in English. 3rd.ed. Cambridge: Cambridge University Press, 2004.
Dyfyniad MLANaterop, B. Jean. Telephoning in English. 3rd.ed. Cambridge University Press, 2004.
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