Pigues D Keith. (2010). Winning with Customers. John Wiley and Sons.
Chicago-čujuhus (17. p.)Pigues D Keith. Winning with Customers. New Jersey: John Wiley and Sons, 2010.
MLA-čujuhus (9. p.)Pigues D Keith. Winning with Customers. John Wiley and Sons, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.