Information System (MDIS) & World Health Organization. (1995). Global prevalence of vitamin A deficiency. World Health Organization.
Citación estilo ChicagoInformation System (MDIS) and World Health Organization. Global Prevalence of Vitamin A Deficiency. Geneva: World Health Organization, 1995.
Cita MLAInformation System (MDIS) and World Health Organization. Global Prevalence of Vitamin A Deficiency. World Health Organization, 1995.
Warning: These citations may not always be 100% accurate.