MLA

of Engineers, United States. Army. Corps. Mostaganem, City Plan / Prepared under the Direction of the Chief of Engineers, U.S. Army. Army Map Service, U.S. Army, 1942. https://collections.library.yale.edu/catalog/15534076.

APA, 6th edition

of Engineers, U. S. A. C. (1942). Mostaganem, city plan / prepared under the direction of the chief of engineers, U.S. Army. [Maps]. Army Map Service, U.S. Army, https://collections.library.yale.edu/catalog/15534076.