MLA

Marinetti, F. T., 1876-1944. Fillia. One page typed letter to Marinetti in Africa, 1935. Deals with the publication of Stile Futurista et La Forza. [7678-1]. box 97, slide 18. 1935. https://collections.library.yale.edu/catalog/10660991.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 97, slide 18"])(1935)[Fillia. One page typed letter to Marinetti in Africa, 1935. Deals with the publication of Stile Futurista et La Forza. [7678-1]]. https://collections.library.yale.edu/catalog/10660991.