APA-Zitierstil (7. Ausg.)

Sharpe, P. J. (1999). Practice exercises for the TOEFL test (4. ed.). Barron's Educational Series, Inc.

Chicago-Zitierstil (17. Ausg.)

Sharpe, Pamela J. Practice Exercises for the TOEFL Test. 4. ed. Hauppauge, NY: Barron's Educational Series, Inc, 1999.

MLA-Zitierstil (9. Ausg.)

Sharpe, Pamela J. Practice Exercises for the TOEFL Test. 4. ed. Barron's Educational Series, Inc, 1999.