Não informado. (2021). The Engineering Index Monthly. Engineering Index.
Chicagoスタイル(17版)引用形式Não informado. The Engineering Index Monthly. New York: Engineering Index, 2021.
MLA(8版)引用形式Não informado. The Engineering Index Monthly. Engineering Index, 2021.
警告: この引用は必ずしも正確ではありません.