ESOMAR, Hamersveld, M. v., & Bont, C. d. (2007). Market research handbook (5th ed.). John Wiley & Sons.
Cita Chicago Style (17a ed.)ESOMAR, Mario van Hamersveld, y Cees de Bont. Market Research Handbook. 5th ed. Chichester, West Sussex, England ; Hoboken, NJ.: John Wiley & Sons, 2007.
Cita MLA (9a ed.)ESOMAR, et al. Market Research Handbook. 5th ed. John Wiley & Sons, 2007.
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