edited by Stephan Haggard, Chung H. Lee and Sylvia Maxfield
Cornell University Press, 1993
Buku Teks
Warde, Ibrahim
Edinburgh University Press, 2000
Buku Teks
Visser, Hans G.
Edward Elgar, 2009
Buku Teks
Muhammad Ayub
John Wiley & Sons Inc., 2010
Buku Teks
Al-Suwailem, Sami
Islamic Development Bank,, 2006
Buku Teks