Covey, S. R. The 7 habits of highly effective people: Restoring the character ethic (Revised edition.).
Style de citation Chicago (17e éd.)Covey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. Revised edition.
Style de citation MLA (8e éd.)Covey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. Revised edition.
Attention : ces citations peuvent ne pas être correctes à 100%.