Santa Maria / drawn at the War Office, 1940.
MLA
Section, Great Britain. War Office. General Staff. Geographical. Santa Maria / Drawn at the War Office, 1940. Army Map Service, U.S. Army, 1942. https://collections.library.yale.edu/catalog/15249358.
APA, 6th edition
Section, G. B. W. O. G. S. G. (1942). Santa Maria / drawn at the War Office, 1940. [Maps]. Army Map Service, U.S. Army, https://collections.library.yale.edu/catalog/15249358.