Não informado. (1955). International Review of Education. Unesco, Institute for Education.
Chicago-viite (17. p.)Não informado. International Review of Education. Hamburg, Alemanha: Unesco, Institute for Education, 1955.
MLA-viite (8. p.)Não informado. International Review of Education. Unesco, Institute for Education, 1955.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.