Allsop, J., & Aspinall, P. (2001). Cambridge Practice Test for Bec 1: Level one. Business English Certificate. Tp. Hồ Chí Minh: Nxb. Trẻ.
シカゴスタイル引用形Allsop, Jake, , Patricia Aspinall. Cambridge Practice Test for Bec 1: Level One. Business English Certificate. Tp. Hồ Chí Minh: Nxb. Trẻ, 2001.
MLA引用形式Allsop, Jake, , Patricia Aspinall. Cambridge Practice Test for Bec 1: Level One. Business English Certificate. Tp. Hồ Chí Minh: Nxb. Trẻ, 2001.
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