Cite

Unsigned and untitled article. No source. In German. [3648-1]

MLA

Marinetti, F. T., 1876-1944. Unsigned and untitled article. No source. In German. [3648-1]. box 46, slide 68. no date. https://collections.library.yale.edu/catalog/10654447.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 46, slide 68"])(no date)[Unsigned and untitled article. No source. In German. [3648-1]]. https://collections.library.yale.edu/catalog/10654447.