Kumar, R. (2019). Research methodology: A step-by-step guide for beginners (5th.). Sage.
Chicago Style (17. basım) AtıfKumar, Ranjit. Research Methodology: A Step-by-step Guide for Beginners. 5th. Los Angeles: Sage, 2019.
MLA (9th ed.) AtıfKumar, Ranjit. Research Methodology: A Step-by-step Guide for Beginners. 5th. Sage, 2019.
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