Cameron, P., & Todd, V. (2006). Prepare for IELTS academic practice tests =: Gáo trình luyện thi IELTS. TP. HCM: Nxb. Trẻ.
शिकागो स्टाइल उद्धरणCameron, Penny., और Vanessa Todd. Prepare for IELTS Academic Practice Tests =: Gáo Trình Luyện Thi IELTS. TP. HCM: Nxb. Trẻ, 2006.
एमएलए उद्धरणCameron, Penny., और Vanessa Todd. Prepare for IELTS Academic Practice Tests =: Gáo Trình Luyện Thi IELTS. TP. HCM: Nxb. Trẻ, 2006.
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