MLA

Section, Great Britain. War Office. General Staff. Geographical. Town Plan of Cherbourg [Cartographic Material] : France / Drawn and Photolithographed by War Office, 1943. [Printed by] Army Map Service, U.S. Army,, Published by War Office ; 1943. https://collections.library.yale.edu/catalog/15484354.

APA, 6th edition

Section, G. B. W. O. G. S. G. (1943). Town plan of Cherbourg [cartographic material] : France / drawn and photolithographed by War Office, 1943. [Maps]. [Printed by] Army Map Service, U.S. Army,, Published by War Office ; https://collections.library.yale.edu/catalog/15484354.