MLA

Marinetti, F. T., 1876-1944. Horace B. Samuel. “The Future of Futurism.” Fortnightly Review, April 1913. [402-1]- [403-1]. box 6, slide 2-3. 1913. https://collections.library.yale.edu/catalog/10648908.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 6, slide 2-3"])(1913)[Horace B. Samuel. “The Future of Futurism.” Fortnightly Review, April 1913. [402-1]- [403-1]]. https://collections.library.yale.edu/catalog/10648908.