Ahmad El-Muhammady bin Muhammad Uthman El-Muhammady. (2010). The role of Mahathir Mohamad in Malaysia-Singapore relations, 1981-2003. Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ahmad El-Muhammady bin Muhammad Uthman El-Muhammady. The Role of Mahathir Mohamad in Malaysia-Singapore Relations, 1981-2003. Gombak, Selangor: Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, 2010.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ahmad El-Muhammady bin Muhammad Uthman El-Muhammady. The Role of Mahathir Mohamad in Malaysia-Singapore Relations, 1981-2003. Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, 2010.