Citazione Stile APA (7a Edizione)

Howitt, D. Introduction to SPSS Statistics in Psychology: For version 19 and earlier : For version 19 and earlier (5.). Pearson Education UK.

Citazione stile Chigago Style (17a edizione)

Howitt, Dennis;Cramer. Introduction to SPSS Statistics in Psychology: For Version 19 and Earlier : For Version 19 and Earlier. 5. Pearson Education UK.

Citatione MLA (8a ed.)

Howitt, Dennis;Cramer. Introduction to SPSS Statistics in Psychology: For Version 19 and Earlier : For Version 19 and Earlier. 5. Pearson Education UK.