Encyclopedia of religious and spiritual development
edited by Elizabeth M. Dowling, W. George Scarlett
Sage Publications, 2006
 Buku Referensi
Basabe, Fernando M.
Religious attitudes of Japanese men: a sociological survey / by Fernando M. Basabe in collaboration with Anzai Shin and Federico Lanzaco.
Sophia University, in cooperation with Charles E. Tuttle, 1968
 Buku Teks
Kalam, A.P.J. Abdul
Guiding souls : dialogues on the purpose of life
Ocean Books, 2005
 Buku Teks SO
Durkheim, Emile
The elementary forms of the religious life
George Allen and Unwin, 1954
 Buku Teks
Simen Andersen Øyen, editor
Sacred science?: on science and its interrelations with religious worldviews
[, Wageningen Academic], 2012
 eBooks