1
Published 1992
2
by Hamilton
Published 1998
3
Published 1997
4
by Wan Hussain Azmi Abdul Kadir
Published 1994
5
by Mohd. Janib Johari
Published 2001
6
by Tajfel
Published 1948
7
by Robiah K. Hamzah
Published 2003
8
by Fryba
Published 1989
9
by Al-Attas
Published 2002
10
11
12
by Bell
Published 2002
13
by نجاتي, دكتور
Published 1993
14
Published 2007
15
16
by Gammer
Published 2009
17
by Joiner
Published 2005
18
19
by Mace
Published 2007
20
by Stewart
Published 2008