Ensiklopedi mini : sejarah dan kebudayaan Islam / Soekama Karya...(et.al); Editor, Badri Yatim
Americana annual / Ed. Bernard S. Cayne, James E. Churchil
The Enscyclopaedia of Islam / edited by C. E. Bosworth, E van Donzel, B. Lewis and Ch. Pellat
Americana Anual