Não informado. (1883). Operator and electrical world. McGraw-Hill.
Chicagoスタイル(17版)引用形式Não informado. Operator and Electrical World. New York: McGraw-Hill, 1883.
MLA(8版)引用形式Não informado. Operator and Electrical World. McGraw-Hill, 1883.
警告: この引用は必ずしも正確ではありません.