Johnson, Ailish (2005). "Vol. 8 Memo Series (Page 6)"(PDF). Social Policy: State of the European Union. Archived from the original(PDF) on 27 February 2008. Retrieved 13 October 2007.
Johnson, Ailish (2005). "Vol. 8 Memo Series (Page 6)"(PDF). Social Policy: State of the European Union. Archived from the original(PDF) on 27 February 2008. Retrieved 13 October 2007.