Não informado. Visual education. National Committee for Visual Aids in Education.
Chicagoスタイル(17版)引用形式Não informado. Visual Education. London: National Committee for Visual Aids in Education.
MLA(8版)引用形式Não informado. Visual Education. National Committee for Visual Aids in Education.
警告: この引用は必ずしも正確ではありません.