Razaq, O. (2010). Test your own toefl score, uji skor toefl anda. Pustaka Widyatama.
Chicagoスタイル(17版)引用形式Razaq, Octa. Test Your Own Toefl Score, Uji Skor Toefl Anda. Pustaka Widyatama, 2010.
MLA(8版)引用形式Razaq, Octa. Test Your Own Toefl Score, Uji Skor Toefl Anda. Pustaka Widyatama, 2010.
警告: この引用は必ずしも正確ではありません.