Covey, S. R. The 7 habits of highly effective people: Restoring the character ethic (Revised edition.).
Citación estilo ChicagoCovey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. Revised edition.
Cita MLACovey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. Revised edition.
Warning: These citations may not always be 100% accurate.