Cite

Anonymous. “Il valore essenziale del Futurismo.” No source. [4401-1]

MLA

Marinetti, F. T., 1876-1944. Anonymous. “Il valore essenziale del Futurismo.” No source. [4401-1]. box 56, slide 21. no date. https://collections.library.yale.edu/catalog/10655698.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 56, slide 21"])(no date)[Anonymous. “Il valore essenziale del Futurismo.” No source. [4401-1]]. https://collections.library.yale.edu/catalog/10655698.