APA (7th ed.) Citation

Norusis, M. J. (1994). SPSS professional statistics 6.1. SPSS Inc.

Chicago Style (17th ed.) Citation

Norusis, Marija J. SPSS Professional Statistics 6.1. Chicago, Ill: SPSS Inc, 1994.

MLA (9th ed.) Citation

Norusis, Marija J. SPSS Professional Statistics 6.1. SPSS Inc, 1994.