Gupta, S. L. . .. (2003). Marketing reserch (1.). Excel Books.
Chicago Edition CitationGupta, S L. Marketing Reserch. 1. New Delhi: Excel Books, 2003.
Cita MLAGupta, S L. Marketing Reserch. 1. Excel Books, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.