MLA

Section, Great Britain. War Office. General Staff. Geographical. Town Plan of Ancona [Cartographic Material] / Compiled and Drawn by by C. I. U., Ground Information Supplied by I. S. T. D. Army Map Service, U.S. Army, 1943. https://collections.library.yale.edu/catalog/15489256.

APA, 6th edition

Section, G. B. W. O. G. S. G. (1943). Town plan of Ancona [cartographic material] / compiled and drawn by by C. I. U., ground information supplied by I. S. T. D. [Maps]. Army Map Service, U.S. Army, https://collections.library.yale.edu/catalog/15489256.