Kumar V., Reinartz W., . (2011). Customer Relationship Management A Databased Approach. New York: John Wiley And Sons.
Kumar V, Reinartz W.J, . 2011. Customer Relationship Management A Databased Approach. New York: John Wiley And Sons.
Kumar V, Reinartz W.J, . Customer Relationship Management A Databased Approach. New York: John Wiley And Sons. 2011.