Norusis, M. J. (1988). SPSS/PC+ V2.0 base manual for the IBM PC/XT/AT and PS/2. SPSS Inc.
Cita Chicago (17th ed.)Norusis, M. J. SPSS/PC+ V2.0 Base Manual for the IBM PC/XT/AT and PS/2. Chicago, Ill: SPSS Inc, 1988.
Cita MLA (9th ed.)Norusis, M. J. SPSS/PC+ V2.0 Base Manual for the IBM PC/XT/AT and PS/2. SPSS Inc, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.