Kim, N. (2008). Revolish toefl iBT Prep: Four skills reading, listening, speaking, writing. Thành phố Hồ Chí Minh: Trẻ.
शिकागो स्टाइल उद्धरणKim, Nathan. Revolish Toefl IBT Prep: Four Skills Reading, Listening, Speaking, Writing. Thành phố Hồ Chí Minh: Trẻ, 2008.
एमएलए उद्धरणKim, Nathan. Revolish Toefl IBT Prep: Four Skills Reading, Listening, Speaking, Writing. Thành phố Hồ Chí Minh: Trẻ, 2008.
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