Cite

R.B. “Enrico Prampolini.” No source, [1926]. [4270-1]-[4271-1]

MLA

Marinetti, F. T., 1876-1944. R.B. “Enrico Prampolini.” No source, [1926]. [4270-1]-[4271-1]. box 54, slide 50-51. 1926. https://collections.library.yale.edu/catalog/10655507.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 54, slide 50-51"])(1926)[R.B. “Enrico Prampolini.” No source, [1926]. [4270-1]-[4271-1]]. https://collections.library.yale.edu/catalog/10655507.