Cornelsen. (2009). Interactive Languages Course Business English Socializing & Small Talk (Kèm trực tiếp sách). Nhân Trí Việt.
Chicago-tyylinen lähdeviittausCornelsen. Interactive Languages Course Business English Socializing & Small Talk (Kèm Trực Tiếp Sách). Nhân Trí Việt, 2009.
MLA-viiteCornelsen. Interactive Languages Course Business English Socializing & Small Talk (Kèm Trực Tiếp Sách). Nhân Trí Việt, 2009.
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