SHARPE, P. J. (2007). Barron's how to prepare for the toefl ibt: Test of english as a foreign language internet-based test (ed.12.). Binarupa Aksara.

SHARPE, Pamela J. Barron's How to Prepare for the Toefl Ibt: Test of English as a Foreign Language Internet-based Test. ed.12. Jakarta: Binarupa Aksara, 2007.

SHARPE, Pamela J. Barron's How to Prepare for the Toefl Ibt: Test of English as a Foreign Language Internet-based Test. ed.12. Binarupa Aksara, 2007.