Cite

Japan road map 1:1,000,000. sheet 4, Korea / prepared under the direction of the Chief of Engineers, U.S. Army, by the Army Map Service (GD) ... 1945.

MLA

Service, United States. Army Map. Japan Road Map 1:1,000,000. Sheet 4, Korea / Prepared under the Direction of the Chief of Engineers, U.S. Army, by the Army Map Service (GD) ... 1945. Army Map Service, 1945. https://collections.library.yale.edu/catalog/15511666.

APA, 6th edition

Service, U. S. A. M. (1945). Japan road map 1:1,000,000. sheet 4, Korea / prepared under the direction of the Chief of Engineers, U.S. Army, by the Army Map Service (GD) ... 1945. [Maps]. Army Map Service, https://collections.library.yale.edu/catalog/15511666.