Williams, J. D. (1967). Mathematics reform in the primary school: A report of a meeting of experts held in Hamburg during January, 1966. UNESCO Inst. for Education.
Chicago-Zitierstil (17. Ausg.)Williams, John D. Mathematics Reform in the Primary School: A Report of a Meeting of Experts Held in Hamburg During January, 1966. Hamburg: UNESCO Inst. for Education, 1967.
MLA-Zitierstil (9. Ausg.)Williams, John D. Mathematics Reform in the Primary School: A Report of a Meeting of Experts Held in Hamburg During January, 1966. UNESCO Inst. for Education, 1967.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.