APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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