Gaya APA

Ismanto, H, R., Widayati, J. (2015). The New TOEIC Official Test Preparation Guide Bilingual Edition . Jakarta: PT International Test Center.

Gaya MLA

Ismanto, Hafilia, R.., Widayati, Juli. "The New TOEIC Official Test Preparation Guide Bilingual Edition". Jakarta: PT International Test Center, 2015. Reference.