APA (7th ed.) Citation

Norusis, M. J. SPSS 6.1 base system user's guide.

Chicago Style (17th ed.) Citation

Norusis, M. J. SPSS 6.1 Base System User's Guide.

MLA (9th ed.) Citation

Norusis, M. J. SPSS 6.1 Base System User's Guide.

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