MLA

Service, United States. Army Map. Harbin [Cartographic Material] / Prepared under the Direction of the Chief of Engineers, U.S. Army, by the Army Map Service. The Service, 1944. https://collections.library.yale.edu/catalog/15509716.

APA, 6th edition

Service, U. S. A. M. (1944). Harbin [cartographic material] / prepared under the direction of the Chief of Engineers, U.S. Army, by the Army Map Service. [Maps]. The Service, https://collections.library.yale.edu/catalog/15509716.