APA-Zitierstil (7. Ausg.)
Covey, S. R. (1990). <The> seven habits of highly effective people: Restoring the character ethic (1st Fireside ed.). Simon & Schuster.
Chicago-Zitierstil (17. Ausg.)
Covey, Stephen R. <The> Seven Habits of Highly Effective People: Restoring the Character Ethic. 1st Fireside ed. New York: Simon & Schuster, 1990.
MLA-Zitierstil (9. Ausg.)
Covey, Stephen R. <The> Seven Habits of Highly Effective People: Restoring the Character Ethic. 1st Fireside ed. Simon & Schuster, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.