Al-Attas, M. N. S. (1990). The intuition of existence: A fundamental basis of Islamic metaphysics. International Institute of Islamic Thought and Civilization, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Al-Attas, Muhammad Naguib Syed. The Intuition of Existence: A Fundamental Basis of Islamic Metaphysics. Kuala Lumpur: International Institute of Islamic Thought and Civilization, International Islamic University Malaysia, 1990.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Al-Attas, Muhammad Naguib Syed. The Intuition of Existence: A Fundamental Basis of Islamic Metaphysics. International Institute of Islamic Thought and Civilization, International Islamic University Malaysia, 1990.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.