MLA

Marinetti, F. T., 1876-1944. Filippo Tommaso Marinetti. “La Simultaneità in letteratura.” Holograph manuscript, corrected, [1936]. [8701-1]-[8704-1]. box 110, slide 1-4. 1936. https://collections.library.yale.edu/catalog/10663042.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 110, slide 1-4"])(1936)[Filippo Tommaso Marinetti. “La Simultaneità in letteratura.” Holograph manuscript, corrected, [1936]. [8701-1]-[8704-1]]. https://collections.library.yale.edu/catalog/10663042.