Não informado. (1946). GEC Telecommunications. General Electric Company.
Chicagoスタイル(17版)引用形式Não informado. GEC Telecommunications. London: General Electric Company, 1946.
MLA(8版)引用形式Não informado. GEC Telecommunications. General Electric Company, 1946.
警告: この引用は必ずしも正確ではありません.