1
by De Bono, Edward
Published 2005
2
by Emmerling, John.
Published 1991
3
4
by Shone, Ronald.
Published 1984
5
6
by De Bono, Edward
Published 2003
7
by Mohd. Azhar Abd. Hamid
Published 2003
8
by Ainon Mohd.
Published 2005
9
by Lim, Kim Hui
Published 2009
10
11
by Xing, Tao
Published 2004
12
by Seelig, Tina
Published 2017
13
14
Published 2005
15
by Too, Lillian
Published 1994
16
17
by Dalrymple, Ron
Published 1995
18
19
by Alder, Harry.
Published 1995
20
by De Bono, Edward
Published 1992