Gupta, S. K. (2011). Business research methodology: Methods, tools and techniques. Kalyani.
Chicago Style (17. basım) AtıfGupta, Shashi K. Business Research Methodology: Methods, Tools and Techniques. New Delhi: Kalyani, 2011.
MLA (9th ed.) AtıfGupta, Shashi K. Business Research Methodology: Methods, Tools and Techniques. Kalyani, 2011.
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