Kim, S., & Kim Soyeong; Park Won; Lê Huy Lâm. (2009). Big step toeic 1: 3 steps to conquer the New TOEIC test. Tp. Hồ Chí Minh: Tổng hợp Tp. Hồ Chí Minh,Công ty TNHH Nhân Trí Việt.
শিকাগো স্টাইলে সাইটেশনKim, Soyeong, এবং Kim Soyeong; Park Won; Lê Huy Lâm. Big Step Toeic 1: 3 Steps to Conquer the New TOEIC Test. Tp. Hồ Chí Minh: Tổng hợp Tp. Hồ Chí Minh,Công ty TNHH Nhân Trí Việt, 2009.
এমএলএ সাইটেশনKim, Soyeong, এবং Kim Soyeong; Park Won; Lê Huy Lâm. Big Step Toeic 1: 3 Steps to Conquer the New TOEIC Test. Tp. Hồ Chí Minh: Tổng hợp Tp. Hồ Chí Minh,Công ty TNHH Nhân Trí Việt, 2009.
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