Centers for Disease Control and prevention (U.S.) & International Clearinghouse for Birth Defects Monitoring System. Birth defects surveillance: A manual for programme managers. World Health Organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)Centers for Disease Control and prevention (U.S.) και International Clearinghouse for Birth Defects Monitoring System. Birth Defects Surveillance: A Manual for Programme Managers. Geneva: World Health Organization.
Παραπομπή σε μορφή MLA (8th εκδ.)Centers for Disease Control and prevention (U.S.) και International Clearinghouse for Birth Defects Monitoring System. Birth Defects Surveillance: A Manual for Programme Managers. World Health Organization.
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