1
Published 2008
2
by Besant
Published 1908
3
4
Published 2016
5
6
by Sorensen
Published 1992
7
by Buzan
Published 1993
8
by De Bono, 1933-
Published 1990
9
by De Bono
Published 1991
10
by Garnham
Published 1994
11
by De Bono
Published 1999
12
by De Bono
Published 1986
13
by De Bono, 1933-
Published 1993
14
by Netton
Published 1996
15
by Searle
Published 1984
16
by Eng
Published 2000
17
by Abd Fatah Hassan
Published 1994
18
by Ainon Mohd
Published 1995
19
by Chaffee
Published 1994
20