Cite

Hokko / prepared under the direction of the Chief of Engineers by the Army Map Service.

MLA

Service, United States. Army Map. Hokko / Prepared under the Direction of the Chief of Engineers by the Army Map Service. Army Map Service, 1945. https://collections.library.yale.edu/catalog/15511671.

APA, 6th edition

Service, U. S. A. M. (1945). Hokko / prepared under the direction of the Chief of Engineers by the Army Map Service. [Maps]. Army Map Service, https://collections.library.yale.edu/catalog/15511671.