Howitt, D. Introduction to Research Methods in Psychology (3.). Pearson Education UK.
Citazione stile Chigago Style (17a edizione)Howitt, Dennis;Cramer. Introduction to Research Methods in Psychology. 3. Pearson Education UK.
Citatione MLA (8a ed.)Howitt, Dennis;Cramer. Introduction to Research Methods in Psychology. 3. Pearson Education UK.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.