Hummel, C. (1977). Education today for the world of tomorrow: A study prepared for the International Bureau of Education. Unesco.
Citazione stile Chigago Style (17a edizione)Hummel, Charles. Education Today for the World of Tomorrow: A Study Prepared for the International Bureau of Education. Paris: Unesco, 1977.
Citatione MLA (9a ed.)Hummel, Charles. Education Today for the World of Tomorrow: A Study Prepared for the International Bureau of Education. Unesco, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.