Não informado. (1970). Education for Development. University College Cardiff, Faculty of Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Education for Development. Cardiff, Inglaterra: University College Cardiff, Faculty of Education, 1970.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Education for Development. University College Cardiff, Faculty of Education, 1970.
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