Greaney, V., & Kellaghan, T. (2008). Assessing national achievement levels in education. World Bank.
Παραπομπή σε μορφή Chicago (17η εκδ.)Greaney, Vincent, και Thomas Kellaghan. Assessing National Achievement Levels in Education. Washington, DC: World Bank, 2008.
Παραπομπή σε μορφή MLA (9th εκδ.)Greaney, Vincent, και Thomas Kellaghan. Assessing National Achievement Levels in Education. World Bank, 2008.