Covey, S. R. (2000). Living the 7 habits: The courage to change (1st Fireside edition.). Simon & Schuster.
Cita Chicago (17th ed.)Covey, Stephen R. Living the 7 Habits: The Courage to Change. 1st Fireside edition. New York: Simon & Schuster, 2000.
Cita MLA (9th ed.)Covey, Stephen R. Living the 7 Habits: The Courage to Change. 1st Fireside edition. Simon & Schuster, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.