Παραπομπή APA

Singh, P., & Kumar, J. N. (2009). customer relationship management (CRM). Regal.

Παραπομπή Chicago Style

Singh, P.P, και Jinender N. Kumar. Customer Relationship Management (CRM). New Delhi: Regal, 2009.

Παραπομπή MLA

Singh, P.P, και Jinender N. Kumar. Customer Relationship Management (CRM). Regal, 2009.