Cameron, P., & Todd, V. (2009). Prepare for IELTS: Academic module general training module practice tests (New ed.). Tp.HCM: Nxb. Trẻ.
Chicago Style aipamenaCameron, Penny., và Vanessa Todd. Prepare for IELTS: Academic Module General Training Module Practice Tests. New ed. Tp.HCM: Nxb. Trẻ, 2009.
MLA aipamenaCameron, Penny., và Vanessa Todd. Prepare for IELTS: Academic Module General Training Module Practice Tests. New ed. Tp.HCM: Nxb. Trẻ, 2009.
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