Cite

Bilbao [cartographic material] : city plan.

MLA

Service, United States. Army Map. Bilbao [Cartographic Material] : City Plan. 1943. https://collections.library.yale.edu/catalog/15487279.

APA, 6th edition

Service, U. S. A. M. (1943). Bilbao [cartographic material] : city plan. [Maps]. https://collections.library.yale.edu/catalog/15487279.