1. Abdalla, M., & Patel, I. M. A. (2010). An islamic perspective on ageing and spirituality. In E. MacKinlay (Ed.), Ageing and spirituality across faiths and cultures (pp. 112–123). London: Jessica Kingsley.
2. Allport, G. W., & Ross, J. M. (1967). Personal religious orientation and prejudice. Journal of Personality and Social Psychology, 5(4), 432–443.
3. Benn, C. (2001). Does faith contribute to healing? Scientific evidence for a correlation between spirituality and health. International Review of Mission, 90(356–357), 140–148.
4. Benson, H. (1997). Heilung durch glauben. München: Heyne.
5. Bori, C., & Holtzman, L. (Eds.). (2010). A Scholar in the shadow: Essays in the legal and theological thought of ibn qayyim al-gawziyyah. Rome: Istituto per l’Oriente C.A. Nallion di Roma.