Covey, S. R. (1989). The seven habits of highly effective people: Restoring the character ethic. New York: A Fireside Book.
Style de citation ChicagoCovey, Stephen R. The Seven Habits of Highly Effective People: Restoring the Character Ethic. New York: A Fireside Book, 1989.
Style de citation MLACovey, Stephen R. The Seven Habits of Highly Effective People: Restoring the Character Ethic. New York: A Fireside Book, 1989.
Attention : ces citations peuvent ne pas être correctes à 100%.