Cite

One page full of signatures. [8894-1]

MLA

Marinetti, F. T., 1876-1944. One page full of signatures. [8894-1]. box 112, slide 34. no date. https://collections.library.yale.edu/catalog/10663424.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 112, slide 34"])(no date)[One page full of signatures. [8894-1]]. https://collections.library.yale.edu/catalog/10663424.