Kothari, C. R. (2007). Research methodology: Methods and techniques (2nd Ed.). New Age International.
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Chicago-čujuhus (17. p.)
Kothari, C. R. Research Methodology: Methods and Techniques. 2nd Ed. New Delhi: New Age International, 2007.
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MLA-čujuhus (9. p.)
Kothari, C. R. Research Methodology: Methods and Techniques. 2nd Ed. New Age International, 2007.
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