雅思考试命题研究小组. (2008). 雅思词汇30天突破: Test bible to break through IELTS vocabulary in 30 days. 中国石化出版社.
Dyfyniad Arddull Chicago雅思考试命题研究小组. 雅思词汇30天突破: Test Bible to Break Through IELTS Vocabulary in 30 Days. 中国石化出版社, 2008.
Dyfyniad MLA雅思考试命题研究小组. 雅思词汇30天突破: Test Bible to Break Through IELTS Vocabulary in 30 Days. 中国石化出版社, 2008.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.