Não informado. (1964). Educational and Psychological Interactions. University of Lund, Malmo School of Education.
Lua i Stíl Chicago (17ú heag.)Não informado. Educational and Psychological Interactions. Malmo, Suecia: University of Lund, Malmo School of Education, 1964.
Lua MLA (8ú heag.)Não informado. Educational and Psychological Interactions. University of Lund, Malmo School of Education, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.