Não informado. (1964). Educational and Psychological Interactions. University of Lund, Malmo School of Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Educational and Psychological Interactions. Malmo, Suecia: University of Lund, Malmo School of Education, 1964.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Educational and Psychological Interactions. University of Lund, Malmo School of Education, 1964.
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