Cite

A good lunch. Packed lunch. [graphic]

MLA

A Good Lunch. Packed Lunch. [Graphic]. National Dairy Council, Chicago, 1943. https://collections.library.yale.edu/catalog/16047691.

APA, 6th edition

A good lunch. Packed lunch. [graphic]. (1943). [Lithographs, Posters]. National Dairy Council, Chicago. https://collections.library.yale.edu/catalog/16047691.