Kovacs, K. (2020). Speaking for IELTS. Tp. Hồ Chí Minh: Tổng hợp.
Chicago Style aipamenaKovacs, Karen. Speaking for IELTS. Tp. Hồ Chí Minh: Tổng hợp, 2020.
MLA aipamenaKovacs, Karen. Speaking for IELTS. Tp. Hồ Chí Minh: Tổng hợp, 2020.
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