APA-viite (7. p.)

Howitt, D., & Cramer, D. (2005). Introduction to research methods in psychology. Pearson/Prentice Hall.

Chicago-viite (17. p.)

Howitt, Dennis, ja Duncan Cramer. Introduction to Research Methods in Psychology. Harlow, England, New York: Pearson/Prentice Hall, 2005.

MLA-viite (9. p.)

Howitt, Dennis, ja Duncan Cramer. Introduction to Research Methods in Psychology. Pearson/Prentice Hall, 2005.