APA Zitierstil

Covey, S. R. (1989). The 7 habits of highly effective people: Restoring the character ethic. Pocket books.

Chicago Zitierstil

Covey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. London: Pocket books, 1989.

MLA Zitierstil

Covey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. Pocket books, 1989.

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