Kumar, R. (2014). Research Methodology: A step by step guide for beginners (4th ed.). Sage.
Chicago-viite (17. p.)Kumar, Ranjit. Research Methodology: A Step by Step Guide for Beginners. 4th ed. New Delhi: Sage, 2014.
MLA-viite (9. p.)Kumar, Ranjit. Research Methodology: A Step by Step Guide for Beginners. 4th ed. Sage, 2014.
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