Sufian, A. J. M. (2009). Methods and techniques of social research (Second edition[rev. and updated].). University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSufian, Abu Jafar Mohammad. Methods and Techniques of Social Research. Second edition[rev. and updated]. Dhaka: University Press, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSufian, Abu Jafar Mohammad. Methods and Techniques of Social Research. Second edition[rev. and updated]. University Press, 2009.
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