World Health organization. (2009). Priority areas for research in communicable diseases. World Health Organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Health organization. Priority Areas for Research in Communicable Diseases. New Delhi: World Health Organization, 2009.
Παραπομπή σε μορφή MLA (8th εκδ.)World Health organization. Priority Areas for Research in Communicable Diseases. World Health Organization, 2009.
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