Kothari, C. R. (2019). Research methodology: Methods and techniques (4th.). New Age International Publication.
Chicago-čujuhus (17. p.)Kothari, C. R. Research Methodology: Methods and Techniques. 4th. Bangalore: New Age International Publication, 2019.
MLA-čujuhus (9. p.)Kothari, C. R. Research Methodology: Methods and Techniques. 4th. New Age International Publication, 2019.
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