Simpkins, F. und Langseth, P. (2012) Learning by Doing [cd], Africa Region Findings & Good Practice Infobriefs. World Bank, Washington, DC: The World Bank Group. doi:10986/9844.

Simpkins, Fiona, und Petter Langseth. Learning by Doing. Cd. Africa Region Findings & Good Practice Infobriefs. World Bank, Washington, DC: The World Bank Group, [2012?], World Bank, Washington, DC: The World Bank Group, [2012?]. https://doi.org/10986/9844.

Simpkins, F., & Langseth, P. (ca. 2012). Learning by Doing [Cd]. In Africa Region Findings & Good Practice Infobriefs. The World Bank Group. https://doi.org/10986/9844

Simpkins, F., und P. Langseth. „Learning by Doing“. Africa Region Findings & Good Practice Infobriefs, cd, The World Bank Group, 2012, https://doi.org/10986/9844.

SIMPKINS, Fiona und Petter LANGSETH, 2012. Learning by Doing. World Bank, Washington, DC: The World Bank Group