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.
Cytowanie według stylu Chicago (wyd. 17)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.
Cytowanie według stylu MLA (wyd. 9)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.