Não informado. (1979). Educational communication and technology. Association for Educational Communications and Technology.
Chicagoスタイル(17版)引用形式Não informado. Educational Communication and Technology. Washington: Association for Educational Communications and Technology, 1979.
MLA(8版)引用形式Não informado. Educational Communication and Technology. Association for Educational Communications and Technology, 1979.
警告: この引用は必ずしも正確ではありません.