1
Published 1993
2
Published 1981
3
by Velayati
Published 2008
4
by Gribbin
Published 2005
5
by Adler
Published 2006
6
7
by Ibn Khaldun, 1332-1406
Published 1985
8
Published 1994
9
10
by Berkey
Published 2003
11
by Badri Yatim
Published 1993
12
by Sabri
Published 2004
13
14
by Imamuddin
Published 1981
15
by Ibn Khaldun, 1332-1406
Published 2005
16
by Freeman
Published 2002
17
by Shaughnessy
Published 2005
18
by Husain
Published 1994
19
by Wink
Published 1997
20
Published 2005