MLA

Service, United States. Army Map. Newfoundland 1:500,000 ... Army Map Service, U.S. Army, 1943. https://collections.library.yale.edu/catalog/15535389.

APA, 6th edition

Service, U. S. A. M. (1943). Newfoundland 1:500,000 ... [Maps]. Army Map Service, U.S. Army, https://collections.library.yale.edu/catalog/15535389.