(1971). Drills and exercises in english pronunciation: Consonats and vowels. Collier-Macmillan international.
Style de citation Chicago (17e éd.)Drills and Exercises in English Pronunciation: Consonats and Vowels. New York: Collier-Macmillan international, 1971.
Style de citation MLA (9e éd.)Drills and Exercises in English Pronunciation: Consonats and Vowels. Collier-Macmillan international, 1971.
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