1
by Covey, Stephen R.
Published 2010
2
by Ahmad Amin Mohamad Sulaiman
Published 2006
3
by Adair, John.
Published 2009
4
by Russo, J. Edward.
Published 1990
5
by Davis, Duane,, 1950-
Published 1985
6
by Schroeder, Roger G.
Published 1981
7
by Adair, John Eric,, 1934-.
Published 1985
8
by Braverman, Jerome D.
Published 1980
9
by Kirk, Stephen J.
Published 1988
10
by Muhamed Awang.
Published 1990