Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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