Não informado. (1910). Journal of Educational Psychology. American Psychological Association.
Chicago-referens (17:e uppl.)Não informado. Journal of Educational Psychology. Arlington, Va: American Psychological Association, 1910.
MLA-referens (8:e uppl.)Não informado. Journal of Educational Psychology. American Psychological Association, 1910.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.