Council for Research in Values and Philosophy, 2005
Buku Teks
Blackwell , 2004
eBooks
Altwaijri, Abdulaziz Othman
ISESCO, 1997
Buku Teks
Herskovits, Melville J. (Melville Jean), 1895-1963, author
Random House, 1972
Buku Teks
Kraidy, Marwan M., 1972-, author
Temple University Press, 2005
Buku Teks