Chawla, D. S. N. (2011). Research Methodology (2nd.). Vikas Publishing House Pvt Ltd.
Chicago-čujuhus (17. p.)Chawla, Deepak; Sondhi N. Research Methodology. 2nd. Noida: Vikas Publishing House Pvt Ltd, 2011.
MLA-čujuhus (9. p.)Chawla, Deepak; Sondhi N. Research Methodology. 2nd. Vikas Publishing House Pvt Ltd, 2011.
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