Não informado. (1964). Educational and Psychological Interactions. University of Lund, Malmo School of Education.
Citação do estilo Chicago (17ª ed.)Não informado. Educational and Psychological Interactions. Malmo, Suecia: University of Lund, Malmo School of Education, 1964.
Citação MLA (8ª ed.)Não informado. Educational and Psychological Interactions. University of Lund, Malmo School of Education, 1964.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.