Sharpe, P. J. (2013). Barron's TOEFL iBT. Hauppauge, N.Y: Barron's.
Trích dẫn kiểu ChicagoSharpe, Pamela J. Barron's TOEFL IBT. Hauppauge, N.Y: Barron's, 2013.
MLA引文Sharpe, Pamela J. Barron's TOEFL IBT. Hauppauge, N.Y: Barron's, 2013.
警告:这些引文格式不一定是100%准确.