Sumathi, S. (2008). Marketing Research and Consumer Behaviour (1st.). Vikas Publishing House PVT LTD.
Chicago-čujuhus (17. p.)Sumathi, S. Marketing Research and Consumer Behaviour. 1st. Noida: Vikas Publishing House PVT LTD, 2008.
MLA-čujuhus (9. p.)Sumathi, S. Marketing Research and Consumer Behaviour. 1st. Vikas Publishing House PVT LTD, 2008.
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