The 7 habits of highly effective people /

Ижил төстэй зүйлс

• Living the 7 habits : stories of courage and inspiration /
  -н: Covey, Stephen R.
  Хэвлэсэн: (1999)
• The 7 habits of highly effective people /
  -н: Covey, Stephen R.
  Хэвлэсэн: (2004)
• The 7 habits of highly effective people /
  -н: Covey R. Stephen
  Хэвлэсэн: (1997)
• Principle-centered leadership /
  -н: Covey, Stephen R.
  Хэвлэсэн: (1991)
• Victory! applying the proven principles of military strategy to achieve success in your business and personal life /
  -н: Tracy, Brian
  Хэвлэсэн: (2002)