Não informado. (1955). International Review of Education. Unesco, Institute for Education.
Chicago-referens (17:e uppl.)Não informado. International Review of Education. Hamburg, Alemanha: Unesco, Institute for Education, 1955.
MLA-referens (8:e uppl.)Não informado. International Review of Education. Unesco, Institute for Education, 1955.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.