1. World Health Organization. Hemoglobin Concentrations for the Diagnosis of Anemia and Assessment of Severity. Vitamin and Mineral Nutrition Information System. Geneva: World Health Organization; 2011.
2. United Nations Children’s Fund/United Nations University/WHO: Iron deficiency anemia. Assessment, Prevention and Control. A Guide for Program Managers (WHO/NHD/01.3). Geneva: World Health Organization; 2001:15–31.
3. World Health Organization. The Global Prevalence of Anemia in 2011. Geneva: World Health Organization; 2015.
4. Nutritional Iron Deficiency Anemia: Magnitude and Its Predictors among School Age Children, Southwest Ethiopia: A Community Based Cross-Sectional Study