Islam, M. N. (2008). An introduction to research methods. Mullik Brothers.
Tohutoru Kātū Chicago (17th ed.)Islam, M. Nurul. An Introduction to Research Methods. Dhaka: Mullik Brothers, 2008.
Tohutoro MLA (9th ed.)Islam, M. Nurul. An Introduction to Research Methods. Mullik Brothers, 2008.
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