Cite

Save [...] and serve the cause of freedom [graphic]

MLA

Cooper, Fred G. (Frederic Gross), 1883-1962, artist. Save [...] and serve the cause of freedom [graphic]. [1917]. https://collections.library.yale.edu/catalog/16048980.

APA, 6th edition

Cooper, Fred G. (Frederic Gross), 1883-1962, artist. ([1917])[Save [...] and serve the cause of freedom [graphic]]. https://collections.library.yale.edu/catalog/16048980.