Gilbert, J. B. (2005). Clear speech: Pronunciation and listening comprehension in North American english teacher`s resource book (3rd ed.). Cambridge University.
Citace podle Chicago (17th ed.)Gilbert, Judy B. Clear Speech: Pronunciation and Listening Comprehension in North American English Teacher`s Resource Book. 3rd ed. Cambridge: Cambridge University, 2005.
Citace podle MLA (9th ed.)Gilbert, Judy B. Clear Speech: Pronunciation and Listening Comprehension in North American English Teacher`s Resource Book. 3rd ed. Cambridge University, 2005.
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