Não informado. (1955). Scientia paedagogica. International Secretariat for Teaching Educational Sciences in Universities.
Lua i Stíl Chicago (17ú heag.)Não informado. Scientia Paedagogica. Gent, Belgica: International Secretariat for Teaching Educational Sciences in Universities, 1955.
Lua MLA (8ú heag.)Não informado. Scientia Paedagogica. International Secretariat for Teaching Educational Sciences in Universities, 1955.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.