O'Connor, J. D., & Fletcher, C. (1990). Sounds English: A pronunciation practice book. TP. HCM: Tổng hợp.
シカゴスタイル引用形O'Connor, J. D., , Clare Fletcher. Sounds English: A Pronunciation Practice Book. TP. HCM: Tổng hợp, 1990.
MLA引用形式O'Connor, J. D., , Clare Fletcher. Sounds English: A Pronunciation Practice Book. TP. HCM: Tổng hợp, 1990.
警告: この引用は必ずしも正確ではありません.