Não informado. (1958). Trends: German constructional engineering for export. Elsner.
Chicagoスタイル(17版)引用形式Não informado. Trends: German Constructional Engineering for Export. Darmstadt, Alemanha: Elsner, 1958.
MLA(8版)引用形式Não informado. Trends: German Constructional Engineering for Export. Elsner, 1958.
警告: この引用は必ずしも正確ではありません.