(1989). Trends and projections of enrolment by level of education and by age: 1960 - 2025 (as assessed in 1989). Unesco.
Chicago-Zitierstil (17. Ausg.)Trends and Projections of Enrolment by Level of Education and by Age: 1960 - 2025 (as Assessed in 1989). Paris: Unesco, 1989.
MLA-Zitierstil (9. Ausg.)Trends and Projections of Enrolment by Level of Education and by Age: 1960 - 2025 (as Assessed in 1989). Unesco, 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.