23. The journal of abnormal psychology and social psychology. Boston : R.G. Badger, [1921-1925] SW322
25. Research methods for the behavioral sciences Gravetter, Frederick J, Boston, MA : Cengage Learning, [2018] GDM516
26. Research methods for the behavioral sciences Stangor, Charles, Stamford, CT: Cengage Learning, [2015] PSY206
28. Journal of personality and social psychology. [Washington, D.C.] : American Psychological Association PSY505 PSY209
