Não informado. (1971). Educational Media International. International Council for Educational Media.
Chicagoスタイル(17版)引用形式Não informado. Educational Media International. London: International Council for Educational Media, 1971.
MLA(8版)引用形式Não informado. Educational Media International. International Council for Educational Media, 1971.
警告: この引用は必ずしも正確ではありません.