Zikmund William. (2003). Business research methods/7e (7th ed.). Thomson.
Chicago Edition CitationZikmund William. Business Research Methods/7e. 7th ed. South-Western: Thomson, 2003.
Cita MLAZikmund William. Business Research Methods/7e. 7th ed. Thomson, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.