MLA

Marinetti, F. T., 1876-1944. Typed text, incomplete, unsigned, dealing with Societa degli Autori e Scrittori, [1935-1936]. [7646-1]. box 96, slide 66. 1935. https://collections.library.yale.edu/catalog/10660920.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 96, slide 66"])(1935)[Typed text, incomplete, unsigned, dealing with Societa degli Autori e Scrittori, [1935-1936]. [7646-1]]. https://collections.library.yale.edu/catalog/10660920.