APA (7th ed.) Citation

SPSS, Inc., Chicago, Ill., & SPSS, I. (1991). SPSS Statistical Algorithms. SPSS.

Chicago Style (17th ed.) Citation

SPSS, Inc., Chicago, Ill., and Inc SPSS. SPSS Statistical Algorithms. Chicago, Ill: SPSS, 1991.

MLA (8th ed.) Citation

SPSS, Inc., Chicago, Ill., and Inc SPSS. SPSS Statistical Algorithms. SPSS, 1991.

Warning: These citations may not always be 100% accurate.