1
by Amidon
Published 1997
2
by Stettner
Published 2003
3
by Zenger
Published 2004
4
by Bright
Published 2003
5
by Baguley
Published 2003
6
7
by Fisher
Published 1999
8
by Elston
Published 2005
9
by Wilkinson
Published 1993
10
11
by Jarvis
Published 2009
12
by Ainon
Published 2007
13
by McWay
Published 2008
14
by Abdul Shukor Abdullah
Published 2004
15
by Stoehr
Published 2002
16
by Bossidy
Published 2002
17
by Nor Shafrin Ahmad
Published 2006
18
Published 2003
19
20
Published 1986