Não informado. (1955). Scientia paedagogica. International Secretariat for Teaching Educational Sciences in Universities.
Citace podle Chicago (17th ed.)Não informado. Scientia Paedagogica. Gent, Belgica: International Secretariat for Teaching Educational Sciences in Universities, 1955.
Citace podle MLA (8th ed.)Não informado. Scientia Paedagogica. International Secretariat for Teaching Educational Sciences in Universities, 1955.
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