Não informado. (1958). International journal of health education. International Union for Health Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. International Journal of Health Education. Geneva, Suíça: International Union for Health Education, 1958.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. International Journal of Health Education. International Union for Health Education, 1958.
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