The 7 habits of highly effective people : powerful lessons in personal change Stephen R. Covey.

by Covey, Stephen R.
Published 2004

Tujuh tabiat orang yang amat berkesan : memulihkan etika akhlak Stephen R. Covey;

by Covey, Stephen R.
Published 1996

First things first : to live, to love, to learn to leave a legacy by Stephen R. Covey, A. Roger Merrill, Rebecca R. Merrill.

by Covey, Stephen R.
Published 1994