Siegel, James T., 1937-, author
University of California Press, 1969
Buku Teks
White, David Manning
Macmillan, 1983
Buku Teks
Daman, Jan
Contact, 1968
Buku Teks
Huber, Carlo, author
The Council for Research Values and Philosophy , 2001
Buku Teks
Lari, Sayyid Mujtaba Musavi, author
Foundation of Islamic Cultural Propagation in The World, 1993
Buku Teks