APA (7th ed.) Zitazioa

Hummel, C. (1977). Education today for the world of tomorrow. Unesco.

Chicago Style (17th ed.) Zitazioa

Hummel, Charles. Education Today for the World of Tomorrow. Paris: Unesco, 1977.

MLA (9th ed.) Zitazioa

Hummel, Charles. Education Today for the World of Tomorrow. Unesco, 1977.