Sharpe, P. J. (2010). Barron's how to prepare for the TOEFL iBT: Test of English as a foreign language Internet-based test. Nxb. Trẻ.
استشهاد بنمط شيكاغوSharpe, Pamela J. Barron's How to Prepare for the TOEFL IBT: Test of English As a Foreign Language Internet-based Test. Nxb. Trẻ, 2010.
MLA استشهادSharpe, Pamela J. Barron's How to Prepare for the TOEFL IBT: Test of English As a Foreign Language Internet-based Test. Nxb. Trẻ, 2010.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.