Raj, M. H., & Chowdhury, F. (2016). Customer service of Grameenphone. BRAC University.
Chicago Style (17. basım) AtıfRaj, Muradul Haque, ve Fairuz Chowdhury. Customer Service of Grameenphone. BRAC University, 2016.
MLA (8th ed.) AtıfRaj, Muradul Haque, ve Fairuz Chowdhury. Customer Service of Grameenphone. BRAC University, 2016.
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