Peterson's 2001. Tài liệu luyện thi TOEFL: TOEFL CBT Practice tests : CD1 - Time: 80', Track 7, Practice test: 1-3 [Đĩa CD-ROM].
シカゴスタイル引用形Peterson's 2001. Tài Liệu Luyện Thi TOEFL: TOEFL CBT Practice Tests : CD1 - Time: 80', Track 7, Practice Test: 1-3 [Đĩa CD-ROM].
MLA引用形式Peterson's 2001. Tài Liệu Luyện Thi TOEFL: TOEFL CBT Practice Tests : CD1 - Time: 80', Track 7, Practice Test: 1-3 [Đĩa CD-ROM].
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