Não informado. (1964). Educational and Psychological Interactions. University of Lund, Malmo School of Education.
Chicago-referens (17:e uppl.)Não informado. Educational and Psychological Interactions. Malmo, Suecia: University of Lund, Malmo School of Education, 1964.
MLA-referens (8:e uppl.)Não informado. Educational and Psychological Interactions. University of Lund, Malmo School of Education, 1964.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.