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-Zitierstil (17. Ausg.)Centers for Disease Control and prevention (U.S.) und International Clearinghouse for Birth Defects Monitoring System. Birth Defects Surveillance: A Manual for Programme Managers. Geneva: World Health Organization.
MLA-Zitierstil (8. Ausg.)Centers for Disease Control and prevention (U.S.) und International Clearinghouse for Birth Defects Monitoring System. Birth Defects Surveillance: A Manual for Programme Managers. World Health Organization.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.