Sufian, A. J. M. (1998). Methods and techniques of social research. University Press.
Cita Chicago (17th ed.)Sufian, Abu Jafar Mohammad. Methods and Techniques of Social Research. Dhaka: University Press, 1998.
Cita MLA (8th ed.)Sufian, Abu Jafar Mohammad. Methods and Techniques of Social Research. University Press, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.