(1961). Paedagogica historica. Centre for Study of History of Education.
Chicagoスタイル(17版)引用形式Paedagogica Historica. Gent, Belgium: Centre for Study of History of Education, 1961.
MLA(9版)引用形式Paedagogica Historica. Centre for Study of History of Education, 1961.
警告: この引用は必ずしも正確ではありません.