Sharpe, P. J. (1989). TOEFL - How to prepare for the Test of English as a Foreign Language (6.ed.). Barron's Educational Serie, Inc.
Chicago-Zitierstil (17. Ausg.)Sharpe, Pamela J. TOEFL - How to Prepare for the Test of English as a Foreign Language. 6.ed. New York, EUA: Barron's Educational Serie, Inc, 1989.
MLA-Zitierstil (9. Ausg.)Sharpe, Pamela J. TOEFL - How to Prepare for the Test of English as a Foreign Language. 6.ed. Barron's Educational Serie, Inc, 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.