Smith, J. (2000). Successful customer retention in a week. Hodder & Stoughton.
Chicago-referens (17:e uppl.)Smith, Jane. Successful Customer Retention in a Week. London: Hodder & Stoughton, 2000.
MLA-referens (8:e uppl.)Smith, Jane. Successful Customer Retention in a Week. Hodder & Stoughton, 2000.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.