(1993). SPSS® base system: Syntax reference guide. Release 6.0. Chicago, Ill: SPSS Inc.
Chicago Style CitationSPSS® Base System: Syntax Reference Guide. Release 6.0. Chicago, Ill: SPSS Inc, 1993.
Cita MLASPSS® Base System: Syntax Reference Guide. Release 6.0. Chicago, Ill: SPSS Inc, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.