Kothari, C. R. (2004). Research methodology: Methods & techniques (2nd ed.). New Age International (P) Ltd..
Cita Chicago Style (17a ed.)Kothari, C. R. Research Methodology: Methods & Techniques. 2nd ed. New Delhi: New Age International (P) Ltd., 2004.
Cita MLA (9a ed.)Kothari, C. R. Research Methodology: Methods & Techniques. 2nd ed. New Age International (P) Ltd., 2004.
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