Directorate General for Education and Culture; Directorate General Press and Communication (2006). Europeans and their Languages(PDF). Archived from the original(PDF) on 2016-04-14. Retrieved 2010-03-11.
Directorate General for Education and Culture; Directorate General Press and Communication (2006). Europeans and their Languages(PDF). Archived from the original(PDF) on 2016-04-14. Retrieved 2010-03-11.