出国留学考试学习中心. (2011). 新托福120分口语30天速成真经: Original test bible for TOEFL in 30 days. 中国石化出版社.
Chicago Style (17th ed.) Citation出国留学考试学习中心. 新托福120分口语30天速成真经: Original Test Bible for TOEFL in 30 Days. 中国石化出版社, 2011.
MLA (8th ed.) Citation出国留学考试学习中心. 新托福120分口语30天速成真经: Original Test Bible for TOEFL in 30 Days. 中国石化出版社, 2011.
Warning: These citations may not always be 100% accurate.