1
by Ashadi Zain
Published 2004
2
by Wan Mohd Nazif
Published 2005
3
by Farkas, Charles M.
Published 1996
4
by Emmerling, John,, 1938-.
Published 1991
5
by Covey, Stephen R.
Published 1991
6
by Nazri Kadir
Published 2010
7
by Syahrul Nizam Junaini.
Published 2011