Peelen, e. (2022). Customer relationship management. Persson india education services.
Čikaški stil citiranja (17. izdanje)Peelen, ed. Customer Relationship Management. Noida: Persson india education services, 2022.
MLA način citiranja (9. izdanje)Peelen, ed. Customer Relationship Management. Persson india education services, 2022.
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