APA (7th ed.) Citation

SPSS, I. (1997). SPSS Base 7.5 for Windows: User's guide. SPSS, Inc.

Chicago Style (17th ed.) Citation

SPSS, Inc. SPSS Base 7.5 for Windows: User's Guide. SPSS, Inc, 1997.

MLA (8th ed.) Citation

SPSS, Inc. SPSS Base 7.5 for Windows: User's Guide. SPSS, Inc, 1997.

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