APA Zitierstil

Covey, S. R. A. (2004). The 8th habit: From effectiveness to greatness.

Chicago Zitierstil

Covey, Stephen R; Author. The 8th Habit: From Effectiveness to Greatness. New York, Simon& Schuster, 2004.

MLA Zitierstil

Covey, Stephen R; Author. The 8th Habit: From Effectiveness to Greatness. 2004.

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.