Kumar, V. (2008). Managing Customers for Profit: Strategies to Increase Profits and Build Loyalty. Pearson Education India Pvt. Ltd.
Chicago-referens (17:e uppl.)Kumar, V. Managing Customers for Profit: Strategies to Increase Profits and Build Loyalty. New Delhi: Pearson Education India Pvt. Ltd, 2008.
MLA-referens (9:e uppl.)Kumar, V. Managing Customers for Profit: Strategies to Increase Profits and Build Loyalty. Pearson Education India Pvt. Ltd, 2008.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.