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.
Citazione stile Chigago Style (17a edizione)Centers for Disease Control and prevention (U.S.) e International Clearinghouse for Birth Defects Monitoring System. Birth Defects Surveillance: A Manual for Programme Managers. Geneva: World Health Organization.
Citatione MLA (8a ed.)Centers for Disease Control and prevention (U.S.) e International Clearinghouse for Birth Defects Monitoring System. Birth Defects Surveillance: A Manual for Programme Managers. World Health Organization.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.