Sumathi, S. (2008). Marketing Research and Consumer Behaviour (1st.). Vikas Publishing House PVT LTD.
Cita Chicago (17th ed.)Sumathi, S. Marketing Research and Consumer Behaviour. 1st. Noida: Vikas Publishing House PVT LTD, 2008.
Cita MLA (9th ed.)Sumathi, S. Marketing Research and Consumer Behaviour. 1st. Vikas Publishing House PVT LTD, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.