Cite

Sabine Pass, Tex., La. / prepared under the direction of the Chief of the Engineers by the Army Map Service (AM), U.S. Army.

MLA

Service, United States. Army Map. Sabine Pass, Tex., La. / Prepared under the Direction of the Chief of the Engineers by the Army Map Service (AM), U.S. Army. Army Map Service, 1947. https://collections.library.yale.edu/catalog/15811513.

APA, 6th edition

Service, U. S. A. M. (1947). Sabine Pass, Tex., La. / prepared under the direction of the Chief of the Engineers by the Army Map Service (AM), U.S. Army. [Maps]. Army Map Service, https://collections.library.yale.edu/catalog/15811513.