Rogerson, P., & Gilbert, J. B. (1990). Speaking clearly: Pronunciation and listening comprehension for learners of English- Student's book. Cambridge: Cambridge University Press.
Παραπομπή Chicago StyleRogerson, Pamela., και Judy B. Gilbert. Speaking Clearly: Pronunciation and Listening Comprehension for Learners of English- Student's Book. Cambridge: Cambridge University Press, 1990.
Παραπομπή MLARogerson, Pamela., και Judy B. Gilbert. Speaking Clearly: Pronunciation and Listening Comprehension for Learners of English- Student's Book. Cambridge: Cambridge University Press, 1990.
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