1. The New Encyclopaedia Britannica; Macropaedia(1983). 15th edn, vol. 9, p. 912 Chicago: Encyclopaedia Britannica.
2. Muslim Peoples: A World Ethnographic Survey(1978). Vol. 9, p. 785. Westport: Greenwood Press.
3. Orientalist libraries today
4. Towards a universal bibliographic system for islamic literature
5. P. S. Davison and D. A. R. Matthews (1969).Assessment ofinformation services.Aslib Proc.21, 280–283.