A statistical study of wastage at school. (1972). UNITED Nations Educational Scientific and Cultural Organization, Office of Statistics. A statistical study of wastage at school: A study prepared for the International Buronu of Education. UNESCO.
Παραπομπή σε μορφή Chicago (17η εκδ.)A statistical study of wastage at school. UNITED Nations Educational Scientific and Cultural Organization, Office of Statistics. A Statistical Study of wastage at School: A Study Prepared for the International Buronu of Education. UNESCO, 1972.
Παραπομπή σε μορφή MLA (9th εκδ.)A statistical study of wastage at school. UNITED Nations Educational Scientific and Cultural Organization, Office of Statistics. A Statistical Study of wastage at School: A Study Prepared for the International Buronu of Education. UNESCO, 1972.