Gaya APA

EBOOK : BARRON’S : The Leader In Test Preparation : TOEFL IBT, 15th Edition. (2016). New York: Barron’s Educational Series, Inc..

Gaya MLA

EBOOK : BARRON’S : The Leader In Test Preparation : TOEFL IBT, 15th Edition. 15. New York: Barron’s Educational Series, Inc., 2016. Text.