organization for economic co-operation and development. (1997). Education at a glance oecd indicators. les indicateurs.
Chicago (17e ed.) Bronvermeldingorganization for economic co-operation and development. Education at a Glance Oecd Indicators. les indicateurs, 1997.
MLA (9e ed.) Bronvermeldingorganization for economic co-operation and development. Education at a Glance Oecd Indicators. les indicateurs, 1997.