(1969). Education for international Understanding: A survey of twelve seminars organised jointly. Unesco.
Citazione stile Chigago Style (17a edizione)Education for International Understanding: A Survey of Twelve Seminars Organised Jointly. Hamburg: Unesco, 1969.
Citatione MLA (9a ed.)Education for International Understanding: A Survey of Twelve Seminars Organised Jointly. Unesco, 1969.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.