Gaya APA

Betsis, A. et al (2014). Succeed In The Toeic Test Volume 1 (Cet.1). : PT. Gelora Aksara Pratama.

Gaya MLA

Betsis, Andrew. et al. "Succeed In The Toeic Test Volume 1". Cet.1 : PT. Gelora Aksara Pratama, 2014. Text.