Kothari, C. R. (2003). Research Methodology: Methods & Techniques. Wishwa Prakashan.
Chicago-čujuhus (17. p.)Kothari, C. R. Research Methodology: Methods & Techniques. New Delhi: Wishwa Prakashan, 2003.
MLA-čujuhus (9. p.)Kothari, C. R. Research Methodology: Methods & Techniques. Wishwa Prakashan, 2003.
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