Cita APA (7a ed.)

Howitt, D., & Cramer, D. (2017). Introduction to SPSS in psychology: For version 23 and earlier (Seventh edition.). Pearson.

Cita Chicago Style (17a ed.)

Howitt, Dennis, y Duncan Cramer. Introduction to SPSS in Psychology: For Version 23 and Earlier. Seventh edition. Harlow, England: Pearson, 2017.

Cita MLA (8a ed.)

Howitt, Dennis, y Duncan Cramer. Introduction to SPSS in Psychology: For Version 23 and Earlier. Seventh edition. Pearson, 2017.