World Bank. Operations Evaluation Department, Besley, T., & Zagha, R. (2005). Development challenges in the 1990s: Leading policymakers speak from experience. World Bank ; Oxford University Press.

World Bank. Operations Evaluation Department, Timothy Besley, and Roberto Zagha. Development Challenges in the 1990s: Leading Policymakers Speak from Experience. Washington, DC : New York: World Bank ; Oxford University Press, 2005.

World Bank. Operations Evaluation Department, et al. Development Challenges in the 1990s: Leading Policymakers Speak from Experience. World Bank ; Oxford University Press, 2005.