MLA

Marinetti, F. T., 1876-1944. Caricature of Marinetti and Benedetta in South America. On stationary of Circolo Itraliano, Buenos Aires, [1926]. [4506-1]. box 57, slide 46. 1926. https://collections.library.yale.edu/catalog/10655869.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 57, slide 46"])(1926)[Caricature of Marinetti and Benedetta in South America. On stationary of Circolo Itraliano, Buenos Aires, [1926]. [4506-1]]. https://collections.library.yale.edu/catalog/10655869.