Buttle, F. (2009). Customer Relationship Management (7th.). Tata McGraw Hill.
Chicago-čujuhus (17. p.)Buttle, Francis. Customer Relationship Management. 7th. New Delhi: Tata McGraw Hill, 2009.
MLA-čujuhus (9. p.)Buttle, Francis. Customer Relationship Management. 7th. Tata McGraw Hill, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.