1
by Horn,Sam.
Published 1991
2
by Ringer, Robert
Published 1990
3
by Mohd. Fadzillah Kamsah, Dato'
Published 2004
4
by Danial Zainal Abidin.
Published 2005
5
by Schuller, Robert Harold.
Published 1990
6
by Schwartz, David J.
Published 2010
7
by Emmerling, John,, 1938-.
Published 1991
8
by Covey, Stephen R.
Published 1991
9
by Covey, Stephen R.
Published 1989
10
by Covey, Stephen R.
Published 1996
11
12
by Ainon Mohd.
Published 2005