International encyclopedia of marketing; Vol. 3
edited by A.S. Bhamhra, A.K. Chaudhary
Anmol Publications PVT, 1998
 Buku Referensi
International encyclopedia of islamic dynasties : (a continuing series) V ol. 8 Bangladesh
editor in chief, Nagendra Kr Singh
New Delhi : Anmol, 2000,
 Buku Referensi
The Columbia encyclopedia; Volume V
editor, William Bridgwater dan Seymour Kurtz
Columbia University Press, 1963
 Buku Referensi
The encyclopedia of religion; Vol. V & VI
edited by Mircea Eliade
Macmillan, 1987
 Buku Referensi
Hastings, James
Encyclopedia of religion and ethics; Volume V
T&T Clark, 1980
 Buku Referensi