Gupta, S. (2008). Managing customers as investments. Pearson Power.
Citazione stile Chigago Style (17a edizione)Gupta, Sunil. Managing Customers as Investments. New Delhi: Pearson Power, 2008.
Citatione MLA (9a ed.)Gupta, Sunil. Managing Customers as Investments. Pearson Power, 2008.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.