Cornelsen. (2009). Interactive Languages Course Business English Socializing & Small Talk (Kèm trực tiếp sách). Nhân Trí Việt.
シカゴスタイル引用形Cornelsen. Interactive Languages Course Business English Socializing & Small Talk (Kèm Trực Tiếp Sách). Nhân Trí Việt, 2009.
MLA引用形式Cornelsen. Interactive Languages Course Business English Socializing & Small Talk (Kèm Trực Tiếp Sách). Nhân Trí Việt, 2009.
警告: この引用は必ずしも正確ではありません.