1. Religiosity, happiness, health, and psychopathology in a probability sample of muslim adolescents;A M Abdel-Khalek;Mental Health, Religion & Culture,2007
2. Ihya ulum-id-din;Abd Al-Ghazzali;Trans.) Kharachi,1982
3. Islamic values and management sciences;S O Alhabshi;Institute of Islamic Understanding Malaysia (IKIM),1994