Lee, K. K. (2004). Campaign management of customer relationship management (CRM) / Lee Kar Kin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLee, Kar Kin. Campaign Management of Customer Relationship Management (CRM) / Lee Kar Kin. 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLee, Kar Kin. Campaign Management of Customer Relationship Management (CRM) / Lee Kar Kin. 2004.
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