Gilbert, J. B. (1993). Clear speech: Pronunciation and listening comprehension in North American English (2.). Cambridge University.
Čikaški stil citiranja (17. izdanje)Gilbert, Judy B. Clear Speech: Pronunciation and Listening Comprehension in North American English. 2. New York, Estados Unidos: Cambridge University, 1993.
MLA način citiranja (9. izdanje)Gilbert, Judy B. Clear Speech: Pronunciation and Listening Comprehension in North American English. 2. Cambridge University, 1993.
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