Gupta, S. (2008). Managing customers as investments. Pearson Power.
Chicago-čujuhus (17. p.)Gupta, Sunil. Managing Customers as Investments. New Delhi: Pearson Power, 2008.
MLA-čujuhus (9. p.)Gupta, Sunil. Managing Customers as Investments. Pearson Power, 2008.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.