APA (7th ed.) Citation

Norušis, M. J. (1990). SPSS base system user's guide. SPSS Inc.

Chicago Style (17th ed.) Citation

Norušis, Marija J. SPSS Base System User's Guide. Chicago, Ill: SPSS Inc, 1990.

MLA (9th ed.) Citation

Norušis, Marija J. SPSS Base System User's Guide. SPSS Inc, 1990.

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