Zaman, T., & Billah, N. M. B. (2018). Customer perception of Airtel telecommunications after the introduction of 4G network. BRAC University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रZaman, Tasawar, और N M Baki Billah. Customer Perception of Airtel Telecommunications After the Introduction of 4G Network. BRAC University, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रZaman, Tasawar, और N M Baki Billah. Customer Perception of Airtel Telecommunications After the Introduction of 4G Network. BRAC University, 2018.
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