Não informado. (1984). Education for Health. World Health Organization, Division of Public Information and Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Education for Health. Geneva, Suíça: World Health Organization, Division of Public Information and Education, 1984.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Education for Health. World Health Organization, Division of Public Information and Education, 1984.
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