Buttle, F. (2015). Customer Relationship Management (3rd.). Routledge.
Chicago-čujuhus (17. p.)Buttle, Francis. Customer Relationship Management. 3rd. Mumbai: Routledge, 2015.
MLA-čujuhus (9. p.)Buttle, Francis. Customer Relationship Management. 3rd. Routledge, 2015.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.