organization for economic co-operation and development. (1997). Education at a glance oecd indicators. les indicateurs.
Chicago-referens (17:e uppl.)organization for economic co-operation and development. Education at a Glance Oecd Indicators. les indicateurs, 1997.
MLA-referens (9:e uppl.)organization for economic co-operation and development. Education at a Glance Oecd Indicators. les indicateurs, 1997.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.