MLA

Marinetti, F. T., 1876-1944. Ugo Zampieri. “Jahier.” [Poesia ed Arte, Feb 1920]. Mentions Soffici in marked section. [1804-1]. box 23, slide 64. 1920. https://collections.library.yale.edu/catalog/10651177.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 23, slide 64"])(1920)[Ugo Zampieri. “Jahier.” [Poesia ed Arte, Feb 1920]. Mentions Soffici in marked section. [1804-1]]. https://collections.library.yale.edu/catalog/10651177.