Sharpe, P. J. (2012). Barron's Toefl iBT (CD-ROM for window and Mac): Internet based test. Tp. Hồ Chí Minh: Tổng hợp Tp. Hồ Chí Minh.
Chicago ZitierstilSharpe, Pamela J. Barron's Toefl IBT (CD-ROM for Window and Mac): Internet Based Test. Tp. Hồ Chí Minh: Tổng hợp Tp. Hồ Chí Minh, 2012.
MLA ZitierstilSharpe, Pamela J. Barron's Toefl IBT (CD-ROM for Window and Mac): Internet Based Test. Tp. Hồ Chí Minh: Tổng hợp Tp. Hồ Chí Minh, 2012.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.