Delors, J. (1996). Learning, the treasure within: Report to UNESCO of the International Commission on Education for the Twenty-first Century. Paris: Unesco Pub.
Παραπομπή Chicago StyleDelors, Jacques. Learning, the Treasure Within: Report to UNESCO of the International Commission On Education for the Twenty-first Century. Paris: Unesco Pub, 1996.
Παραπομπή MLADelors, Jacques. Learning, the Treasure Within: Report to UNESCO of the International Commission On Education for the Twenty-first Century. Paris: Unesco Pub, 1996.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.