MLA

Marinetti, F. T., 1876-1944. Unsigned article. “Il teatro sintetico futurista.” Roma (Cairo), 8-9 mag. 1920. [1981]. box 26, slide 1. 1920. https://collections.library.yale.edu/catalog/10651483.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 26, slide 1"])(1920)[Unsigned article. “Il teatro sintetico futurista.” Roma (Cairo), 8-9 mag. 1920. [1981]]. https://collections.library.yale.edu/catalog/10651483.