Cite

Achille Funi. Untitled letter to the editor. No source [---sta], [1931]. [6413-1]

MLA

Marinetti, F. T., 1876-1944. Achille Funi. Untitled letter to the editor. No source [---sta], [1931]. [6413-1]. box 81, slide 33. 1931. https://collections.library.yale.edu/catalog/10658781.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 81, slide 33"])(1931)[Achille Funi. Untitled letter to the editor. No source [---sta], [1931]. [6413-1]]. https://collections.library.yale.edu/catalog/10658781.