MLA

Section, Great Britain. War Office. General Staff. Geographical. Island of Madeira. Army map service, U.S. Army, 1943. https://collections.library.yale.edu/catalog/15238412.

APA, 6th edition

Section, G. B. W. O. G. S. G. (1943). Island of Madeira. [Maps]. Army map service, U.S. Army, https://collections.library.yale.edu/catalog/15238412.