Gaya APA

Ph.D, P, J, S. (2006). BARRON'S THE LEADER IN TEST PREPARATION : TOEFL IBT (14). New York: Barron\'s Edcational Series, Inc..

Gaya MLA

Ph.D, Pamela, J., Sharpe,. "BARRON'S THE LEADER IN TEST PREPARATION : TOEFL IBT". 14 New York: Barron\'s Edcational Series, Inc., 2006. Text.