MLA

Food Is a Weapon. Don't Waste It! [Graphic]. United States Office of War Information, United States Government Printing Office, 0AD. https://collections.library.yale.edu/catalog/16046920.

APA, 6th edition

Food is a weapon. Don't waste it! [graphic]. (0 C.E.). [Posters, War posters, Offset lithographs]. United States Office of War Information, United States Government Printing Office. https://collections.library.yale.edu/catalog/16046920.