Gaya APA

Sharpe, P, J. (2010). TOEFL iBT: internet based test 13th ed. (13th ed.). New York: Barron's Educationnal series.

Gaya MLA

Sharpe, Pamela, J.. "TOEFL iBT: internet based test 13th ed.". 13th ed. New York: Barron's Educationnal series, 2010. Text.