APA-referens

Howitt, D., & Cramer, D. (2014). Introduction to SPSS in psychology (6th ed.). Pearson Education Limited.

Chicago-stil citat

Howitt, Dennis, och Duncan Cramer. Introduction to SPSS in Psychology. 6th ed. Harlow: Pearson Education Limited, 2014.

MLA-referens

Howitt, Dennis, och Duncan Cramer. Introduction to SPSS in Psychology. 6th ed. Pearson Education Limited, 2014.