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.
Chicago-referens (17:e uppl.)Centers for Disease Control and prevention (U.S.) och International Clearinghouse for Birth Defects Monitoring System. Birth Defects Surveillance: A Manual for Programme Managers. Geneva: World Health Organization.
MLA-referens (8:e uppl.)Centers for Disease Control and prevention (U.S.) och International Clearinghouse for Birth Defects Monitoring System. Birth Defects Surveillance: A Manual for Programme Managers. World Health Organization.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.