Não informado. (1979). Communications Engineering International. ESP Communications.
Chicagoスタイル(17版)引用形式Não informado. Communications Engineering International. Surrey, Inglaterra: ESP Communications, 1979.
MLA(8版)引用形式Não informado. Communications Engineering International. ESP Communications, 1979.
警告: この引用は必ずしも正確ではありません.