Judy B Gilbert. (2001). Clear speech from the start (3 cassettes in box): Basic pronunciation and listening comprehension in North American English. Cambridge, UK: Cambridge Univ. Press.
Trích dẫn kiểu ChicagoJudy B Gilbert. Clear Speech From the Start (3 Cassettes in Box): Basic Pronunciation and Listening Comprehension in North American English. Cambridge, UK: Cambridge Univ. Press, 2001.
Trích dẫn MLAJudy B Gilbert. Clear Speech From the Start (3 Cassettes in Box): Basic Pronunciation and Listening Comprehension in North American English. Cambridge, UK: Cambridge Univ. Press, 2001.
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