MLA

Dig for Victory. For Their Sake -- Grow Your Own Vegetables! [Graphic]. H. M. Stationery Office, Jarrold & Sons, Ltd., Norwich, 0AD. https://collections.library.yale.edu/catalog/16046952.

APA, 6th edition

Dig for victory. For their sake -- grow your own vegetables! [graphic]. (0 C.E.). [Posters, War posters, Offset lithographs]. H. M. Stationery Office, Jarrold & Sons, Ltd., Norwich. https://collections.library.yale.edu/catalog/16046952.