American Psychological Association
Covey, Stephen R ( 1990 ). Seven Habits of Highly Effective People Restoring the Character Ethic ( 00 ed. ). Washington Square Press.
Modern Language Association
Covey, Stephen R. Seven Habits of Highly Effective People Restoring the Character Ethic . Washington Square Press. 1990
Chicago Citation
Covey, Stephen R. Seven Habits of Highly Effective People Restoring the Character Ethic . 00 .New York
: Washington Square Press, 1990.
American Medical Association
Covey, Stephen R. Seven Habits of Highly Effective People Restoring the Character Ethic . Washington Square Press; 1990.
