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.
Cita Chicago (17th ed.)Centers for Disease Control and prevention (U.S.) i International Clearinghouse for Birth Defects Monitoring System. Birth Defects Surveillance: A Manual for Programme Managers. Geneva: World Health Organization.
Cita MLA (8th ed.)Centers for Disease Control and prevention (U.S.) i International Clearinghouse for Birth Defects Monitoring System. Birth Defects Surveillance: A Manual for Programme Managers. World Health Organization.
Atenció: Aquestes cites poden no estar 100% correctes.