雅思考试命题研究小组. (2004). 雅思听力30天突破: A Test Bible to Break Through IELTS Listening in 30 Days. 中国石化出版社.
Dyfyniad Arddull Chicago雅思考试命题研究小组. 雅思听力30天突破: A Test Bible to Break Through IELTS Listening in 30 Days. 中国石化出版社, 2004.
Dyfyniad MLA雅思考试命题研究小组. 雅思听力30天突破: A Test Bible to Break Through IELTS Listening in 30 Days. 中国石化出版社, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.