Gaya APA

Hapka, C., Hasibuan, B. (2008). High School Musical Stories From East High #7: Sahabat sejati . Jakarta: PT Elek Media Komputindo.

Gaya MLA

Hapka, Catherine., Hasibuan, Bulan. "High School Musical Stories From East High #7: Sahabat sejati". Jakarta: PT Elek Media Komputindo, 2008. Text.