Razaq, O. (2010). Test your own toefl score, uji skor toefl anda. Pustaka Widyatama.
Chicago Style (17th ed.) CitationRazaq, Octa. Test Your Own Toefl Score, Uji Skor Toefl Anda. Pustaka Widyatama, 2010.
MLA引文Razaq, Octa. Test Your Own Toefl Score, Uji Skor Toefl Anda. Pustaka Widyatama, 2010.
警告：這些引文格式不一定是100％准確.