MLA

Doctors Are Scarce One out of Three Has Gone to the War. [Graphic]. Office of War Information, Washington D. C., U. S. Government Printing Office, 0AD. https://collections.library.yale.edu/catalog/16048974.

APA, 6th edition

Doctors are scarce one out of three has gone to the war. [graphic]. (0 C.E.). [Posters, War posters, Photomechanical prints]. Office of War Information, Washington D. C., U. S. Government Printing Office. https://collections.library.yale.edu/catalog/16048974.