1. Human Nature from a Comparative Psychological Perspective
2. Al-Attas, S. M. N. (1990). The nature of man and the psychology of the human soul. Kuala Lumpur: International Institute of Islamic Thought and Civilization.
3. Al-Attas, S. M. N. (1992). The concept of religion and the foundation of ethics and morality. Kuala Lumpur: International Institute of Islamic Thought and Civilization.
4. Al-Attas, S. M. N. (1993). The meaning and experience of happiness in Islam. Kuala Lumpur: International Institute of Islamic Thought and Civilization.
5. Al-Attas, S. M. N. (1994). The degrees of existence. Kuala Lumpur: International Institute of Islamic Thought and Civilization.