Não informado. (2019). The Engineering Index Annual. Engineering Index.
Chicagoスタイル(17版)引用形式Não informado. The Engineering Index Annual. New York: Engineering Index, 2019.
MLA(8版)引用形式Não informado. The Engineering Index Annual. Engineering Index, 2019.
警告: この引用は必ずしも正確ではありません.