Kothari, C. R. (2004). Research methodology: Methods & techniques (2nd rev. ed.). New Age International (P) Ltd., Publishers.
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Chicago-čujuhus (17. p.)
Kothari, C. R. Research Methodology: Methods & Techniques. 2nd rev. ed. New Delhi: New Age International (P) Ltd., Publishers, 2004.
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MLA-čujuhus (9. p.)
Kothari, C. R. Research Methodology: Methods & Techniques. 2nd rev. ed. New Age International (P) Ltd., Publishers, 2004.
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