MLA

Marinetti, F. T., 1876-1944. Filippo Tommaso Marinetti. "Un nouveau poème du poète Marinetti." [1930s]. Corrected autograph manuscript. [10723-1]-[10728-1]. box 135, slide 23-28. no date. https://collections.library.yale.edu/catalog/10666949.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 135, slide 23-28"])(no date)[Filippo Tommaso Marinetti. "Un nouveau poème du poète Marinetti." [1930s]. Corrected autograph manuscript. [10723-1]-[10728-1]]. https://collections.library.yale.edu/catalog/10666949.