Huber, Carlo
The Council for Research Values and Philosophy , 2001
Buku Teks
Musavi Lari, Mujtaba
Foundation of Islamic Cultural Propagation in The World, 1993
Buku Teks
White, David Manning
Macmillan, 1983
Buku Teks
Siegel, James T., 1937-
University of California Press, 1969
Buku Teks
Frazer, James George, Sir, 1854-1941
Macmillan, 1955
Buku Teks