organization for economic co-operation and development. (1997). Education at a glance oecd indicators. les indicateurs.
Cita Chicago (17th ed.)organization for economic co-operation and development. Education at a Glance Oecd Indicators. les indicateurs, 1997.
Cita MLA (9th ed.)organization for economic co-operation and development. Education at a Glance Oecd Indicators. les indicateurs, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.