Greaney, V., & Kellaghan, T. (2008). Assessing national achievement levels in education. World Bank.
Chicago-referens (17:e uppl.)Greaney, Vincent, och Thomas Kellaghan. Assessing National Achievement Levels in Education. Washington, DC: World Bank, 2008.
MLA-referens (9:e uppl.)Greaney, Vincent, och Thomas Kellaghan. Assessing National Achievement Levels in Education. World Bank, 2008.