Jakeman, V. (2004). Insight into IELTS extra with answer. Đà Nẵng: Nhà xuất bản Đà Nẵng.
শিকাগো স্টাইলে সাইটেশনJakeman, Vanessa. Insight Into IELTS Extra With Answer. Đà Nẵng: Nhà xuất bản Đà Nẵng, 2004.
এমএলএ সাইটেশনJakeman, Vanessa. Insight Into IELTS Extra With Answer. Đà Nẵng: Nhà xuất bản Đà Nẵng, 2004.
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