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.
Lua i Stíl Chicago (17ú heag.)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.
Lua MLA (9ú heag.)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.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.