Não informado. (1967). Educational television international. Centre for Educational Television Overseas.
Chicagoスタイル(17版)引用形式Não informado. Educational Television International. London: Centre for Educational Television Overseas, 1967.
MLA(8版)引用形式Não informado. Educational Television International. Centre for Educational Television Overseas, 1967.
警告: この引用は必ずしも正確ではありません.