The Muslim World
Blackwell Publishing,
 Majalah, Jurnal, Buletin
The Oxford dictionary of world religions
edited by John Bowker
Oxford University Press, 1997
 Buku Referensi
Britannica encyclopedia of world religions
consulting editor, Wendy Doniger
Encyclopaedia Britannica, Inc., 2006
 Buku Referensi
Holm, Jean
Keyguide to information sources on world religions / Jean Holm
Mansell, 1991
 Buku Referensi
Godwin, Joscelyn
Mystery religions : in the ancient world / Joscelyn Godwin
Thames and Hudson, 1981
 Buku Teks SO