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..
Chicago Style (17th ed.) ZitazioaWorld 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.
MLA (9th ed.) ZitazioaWorld 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.