Bettany, G.T.
Encyclopedia of world religions
Bracken Books, [date of publication not identified]
 Buku Referensi
The World's religions
edited by Stewart Sutherland, Leslie Houlden, Peter Clarke, Friedhelm Hardy
Routledge, 1988
 Buku Referensi
The world's religions: Islam
edited by Peter Clarke
Routledge, 1990
 Buku Teks
The World's religions: Islam
edited by Peter Clarke
Routledge, 1988
 Buku Teks
Who's who of world religions
editor, John R. Hinnells
Macmillan, 1993
 Buku Referensi