Janssens, W. (2008). Marketing research with SPSS. Prentice Hall/Financial Times.
Cita Chicago (17th ed.)Janssens, Wim. Marketing Research with SPSS. Harlow, England, New York: Prentice Hall/Financial Times, 2008.
Cita MLA (9th ed.)Janssens, Wim. Marketing Research with SPSS. Prentice Hall/Financial Times, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.