Norušis, M. J. (1990). SPSS/PC+ 4.0 Base Manual: For the IBM PC/XT/AT and PS/2. SPSS Inc.
Chicago Style (17th ed.) CitationNorušis, Marija J. SPSS/PC+ 4.0 Base Manual: For the IBM PC/XT/AT and PS/2. Chicago, Ill. [u.a.]: SPSS Inc, 1990.
MLA (9th ed.) CitationNorušis, Marija J. SPSS/PC+ 4.0 Base Manual: For the IBM PC/XT/AT and PS/2. SPSS Inc, 1990.
Warning: These citations may not always be 100% accurate.