Gaya APA

Penny, C., Vanessa, T. (2008). Prepare for IELTS : General Training Practice Tests (New). Jakarta: PT Gramedia Pustaka Utama.

Gaya MLA

Penny, Cameron., Vanessa, Tood. "Prepare for IELTS : General Training Practice Tests". New Jakarta: PT Gramedia Pustaka Utama, 2008. Teks.