Covey, S. R. The 7 habits of highly effective people: Restoring the character ethic (Revised edition.).
Citação norma ChicagoCovey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. Revised edition.
Citação norma MLACovey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. Revised edition.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.