World Bank. Africa Regional Office. Human Development Department. (2007). Recruiting, retaining, and retraining secondary school teachers and principals in Sub-Saharan Africa. World Bank, Africa Region, Human Development Dept..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)World Bank. Africa Regional Office. Human Development Department. Recruiting, Retaining, and Retraining Secondary School Teachers and Principals in Sub-Saharan Africa. Washington, D.C.: World Bank, Africa Region, Human Development Dept., 2007.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)World Bank. Africa Regional Office. Human Development Department. Recruiting, Retaining, and Retraining Secondary School Teachers and Principals in Sub-Saharan Africa. World Bank, Africa Region, Human Development Dept., 2007.