APA (7th ed.) Citation

SPSS, Inc., Chicago, Ill., & SPSS, I. (1990). SPSS/PC+ Graphics for the IBM PC/XT/AT and PS/2. SPSS Inc.

Chicago Style (17th ed.) Citation

SPSS, Inc., Chicago, Ill., and Inc SPSS. SPSS/PC+ Graphics for the IBM PC/XT/AT and PS/2. Chicago, Ill: SPSS Inc, 1990.

MLA (8th ed.) Citation

SPSS, Inc., Chicago, Ill., and Inc SPSS. SPSS/PC+ Graphics for the IBM PC/XT/AT and PS/2. SPSS Inc, 1990.