Blindenbacher, R., & Nashat, B. (2010). The black box of governmental learning: The learning spiral -- a concept to organize learning in governments. International Bank for Reconstruction and Development/World Bank.

Blindenbacher, Raoul, and Bidjan Nashat. The Black Box of Governmental Learning: The Learning Spiral -- a Concept to Organize Learning in Governments. Washington, D.C.: International Bank for Reconstruction and Development/World Bank, 2010.

Blindenbacher, Raoul, and Bidjan Nashat. The Black Box of Governmental Learning: The Learning Spiral -- a Concept to Organize Learning in Governments. International Bank for Reconstruction and Development/World Bank, 2010.