Singh, P., & Kumar, J. N. (2009). customer relationship management (CRM). Regal.
Chicago Edition CitationSingh, P.P, i Jinender N. Kumar. Customer Relationship Management (CRM). New Delhi: Regal, 2009.
Cita MLASingh, P.P, i Jinender N. Kumar. Customer Relationship Management (CRM). Regal, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.