Gilbert, J. Clear Speech. Cambridge: Cambridge University Press, 1993 86 p. 0-521-42116-0.
Gilbert, J. Clear Speech. Cambridge: Cambridge University Press, 1993 86 p. 0-521-42116-0.
Gilbert, J. (1993) Clear Speech, Cambridge: Cambridge University Press 86 p. 0-521-42116-0.
Gilbert, J. (1993). Clear Speech. Pronunciation and Listening Comprehension in North American English - Teacher's Resource Book. Cambridge: Cambridge University Press, 86 p.
Gilbert J. Clear Speech: Pronunciation and Listening Comprehension in North American English - Teacher's Resource Book. Cambridge: Cambridge University Press; 1993. p. 86 p. ISBN: 0-521-42116-0.