APA (7th ed.) Citation

SPSS Inc. (1986). SPSS user's guide (2d ed.). SPSS.

Chicago Style (17th ed.) Citation

SPSS Inc. SPSS User's Guide. 2d ed. Chicago: SPSS, 1986.

MLA (9th ed.) Citation

SPSS Inc. SPSS User's Guide. 2d ed. SPSS, 1986.

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