O"connor, J., & Fletcher, C. (1989). Sounds English: A Pronunciation Practice Book. London: Longman.
Trích dẫn kiểu ChicagoO"connor, J.d., và Clare Fletcher. Sounds English: A Pronunciation Practice Book. London: Longman, 1989.
MLA CitationO"connor, J.d., và Clare Fletcher. Sounds English: A Pronunciation Practice Book. London: Longman, 1989.
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