MLA

Marinetti, F. T., 1876-1944. Thank you note to Marinetti from “Ispettore, Partito Nazionale Fascista” for a copy of "Il Teatro futurista." 11 dic 1941. [10184-1]. box 128, slide 44. 1941. https://collections.library.yale.edu/catalog/10666250.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 128, slide 44"])(1941)[Thank you note to Marinetti from “Ispettore, Partito Nazionale Fascista” for a copy of "Il Teatro futurista." 11 dic 1941. [10184-1]]. https://collections.library.yale.edu/catalog/10666250.