Gaya APA

BARRON'S The Leader in Test Preparation: IELTS International English Language Testing System. (2013). New York: Barron\'s Educational Series, Inc..

Gaya MLA

BARRON'S The Leader in Test Preparation: IELTS International English Language Testing System. Ed. 3, Cet. 6. New York: Barron\'s Educational Series, Inc., 2013. Text.