Cita APA (7a ed.)

Norusis, M. J. (1994). SPSS Professional Statistics 6.1. SPSS.

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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