(2006). Toefl iBT: The English scores you need! New York: Learning express.
Trích dẫn kiểu ChicagoToefl IBT: The English Scores You Need! New York: Learning express, 2006.
MLA引文Toefl IBT: The English Scores You Need! New York: Learning express, 2006.
警告：这些引文格式不一定是100％准确.