Não informado. (1963). Educational psychologist. American Psychological Association.
Chicago-referens (17:e uppl.)Não informado. Educational Psychologist. Hillsdale, NJ: American Psychological Association, 1963.
MLA-referens (8:e uppl.)Não informado. Educational Psychologist. American Psychological Association, 1963.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.