Rahman, M. S., & Sharkar, M. Z. H. (2011). eCRM and eCRM practices in GrameenPhone and its impact. BRAC University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRahman, Md. Saifur, और Mohammad Zakir Hossain Sharkar. ECRM and ECRM Practices in GrameenPhone and Its Impact. BRAC University, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRahman, Md. Saifur, और Mohammad Zakir Hossain Sharkar. ECRM and ECRM Practices in GrameenPhone and Its Impact. BRAC University, 2011.
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