Stephen R.Covey. (2016). The 7 Habits of Highly Effective Network Marketing Professionals (NA.). Manjul Corporate and Editorial Office.
Chicago-referens (17:e uppl.)Stephen R.Covey. The 7 Habits of Highly Effective Network Marketing Professionals. NA. NEW DELHI: Manjul Corporate and Editorial Office, 2016.
MLA-referens (9:e uppl.)Stephen R.Covey. The 7 Habits of Highly Effective Network Marketing Professionals. NA. Manjul Corporate and Editorial Office, 2016.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.