APA Style

NORUSIS, M, J. (1990). SPSS/PC + STATISTICS 4.0 : FOR THE IBM PC/XT/AT AND PS/2 : INSTALLATION GUIDE GETTING STARTED BASE MANUAL . CHICAGO: SPSS INC..

MLA Style

NORUSIS, MARIJA, J.. "SPSS/PC + STATISTICS 4.0 : FOR THE IBM PC/XT/AT AND PS/2 : INSTALLATION GUIDE GETTING STARTED BASE MANUAL". CHICAGO: SPSS INC., 1990. Text.