MLA

Marinetti, F. T., 1876-1944. Anonymous. “I nuovi Poeti Futuristi e la Poesia.” No source, [1926]. [4431-1]-[4432-1]. box 56, slide 51-52. 1926. https://collections.library.yale.edu/catalog/10655749.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 56, slide 51-52"])(1926)[Anonymous. “I nuovi Poeti Futuristi e la Poesia.” No source, [1926]. [4431-1]-[4432-1]]. https://collections.library.yale.edu/catalog/10655749.