MLA

Marinetti, F. T., 1876-1944. Filippo Tommaso Marinetti. "Manifesto del Futurismo." No source. With opinions of Luigi Capuana. [368-1]. box 5, slide 48. no date. https://collections.library.yale.edu/catalog/10648841.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 5, slide 48"])(no date)[Filippo Tommaso Marinetti. "Manifesto del Futurismo." No source. With opinions of Luigi Capuana. [368-1]]. https://collections.library.yale.edu/catalog/10648841.