SUMATHI S. (2008). MARKETING RESEARCH & CONSUMER BEHAVIOUR. VIKAS PUBLISHING HOUSE.
Chicago-čujuhus (17. p.)SUMATHI S. MARKETING RESEARCH & CONSUMER BEHAVIOUR. NEW DELHI: VIKAS PUBLISHING HOUSE, 2008.
MLA-čujuhus (9. p.)SUMATHI S. MARKETING RESEARCH & CONSUMER BEHAVIOUR. VIKAS PUBLISHING HOUSE, 2008.
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