Rahman, M. S., & Sharkar, M. Z. H. (2011). eCRM and eCRM practices in GrameenPhone and its impact. BRAC University.
Čikaški stil citiranja (17. izdanje)Rahman, Md. Saifur, i Mohammad Zakir Hossain Sharkar. ECRM and ECRM Practices in GrameenPhone and Its Impact. BRAC University, 2011.
MLA način citiranja (8. izdanje)Rahman, Md. Saifur, i Mohammad Zakir Hossain Sharkar. ECRM and ECRM Practices in GrameenPhone and Its Impact. BRAC University, 2011.
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