GUPTA S L. (2002). CASES AND PROBLEMS IN MARKETING RESEARCH. HIMALAYA PUBLISHING HOUSE.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGUPTA S L. CASES AND PROBLEMS IN MARKETING RESEARCH. MUMBAI: HIMALAYA PUBLISHING HOUSE, 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGUPTA S L. CASES AND PROBLEMS IN MARKETING RESEARCH. HIMALAYA PUBLISHING HOUSE, 2002.
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