Kothari,C.R. (2004). Research Methology: Methods and Techniques (2nd ed.). New Age International.
Chicago-čujuhus (17. p.)Kothari,C.R. Research Methology: Methods and Techniques. 2nd ed. New Delhi: New Age International, 2004.
MLA-čujuhus (9. p.)Kothari,C.R. Research Methology: Methods and Techniques. 2nd ed. New Age International, 2004.
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