Nasr, Seyyed Hossein, author
Routledge, 2008
Buku Teks
Attenborough, David
BBC Worldwide Limited, 2004
Multimedia
Ibrahim M. Abu-Rabi
BlackWell Publishing, 2006
Buku Teks
Watt, William Montgomery, author
Edinburg University Press, 1980
Buku Teks
Scholars, Dutch, author
W. Van Hoeve, 1960
Buku Teks