GUPTA S L. (2002). CASES AND PROBLEMS IN MARKETING RESEARCH. HIMALAYA PUBLISHING HOUSE.
Chicago (17e ed.) BronvermeldingGUPTA S L. CASES AND PROBLEMS IN MARKETING RESEARCH. MUMBAI: HIMALAYA PUBLISHING HOUSE, 2002.
MLA (9e ed.) BronvermeldingGUPTA S L. CASES AND PROBLEMS IN MARKETING RESEARCH. HIMALAYA PUBLISHING HOUSE, 2002.
Let op: Deze citaties zijn niet altijd 100% accuraat.