Al-Attas, M. N. (1976). Islām, the concept of religion and the foundation of ethics and morality: A lecture delivered on Monday the 5th of April 1976 to the International Islamic Conference held under the auspices of the Islamic Council of Europe in the hall of the Royal Commonwealth Society, London. Angkatan Belia Islam Malaysia.

Al-Attas, Muhammad Naguib. Islām, the Concept of Religion and the Foundation of Ethics and Morality: A Lecture Delivered on Monday the 5th of April 1976 to the International Islamic Conference Held Under the Auspices of the Islamic Council of Europe in the Hall of the Royal Commonwealth Society, London. Kuala Lumpur: Angkatan Belia Islam Malaysia, 1976.

Al-Attas, Muhammad Naguib. Islām, the Concept of Religion and the Foundation of Ethics and Morality: A Lecture Delivered on Monday the 5th of April 1976 to the International Islamic Conference Held Under the Auspices of the Islamic Council of Europe in the Hall of the Royal Commonwealth Society, London. Angkatan Belia Islam Malaysia, 1976.