1. Catholic Primary Schools Management Association (CPSMA) . 2008 . http://www.ossory.ie/education/cpsma.htm .
2. Center for Education Reform (CER) . 2008 . National charter school data . http://www.edreform.com/_upload/CER_charter_numbers.pdf .
3. Central Statistics Office Ireland (CSO) . 2008 . Persons in full-time education by level (number) . http://www.cso.ie/statistics/per_full_time_edu.htm .
4. Chicago Public Schools . 2008 . At a glance . http://www.cps.k12.il.us/AtAGlance.html .