MLA

Marinetti, F. T., 1876-1944. Typed letter to Marinetti from Sindacato Giornalisti di Roma, dated 20 settembre 1934, asking him to fill out a questionaire about his journalistic capacities. [10722-1]. box 135, slide 22. 1934. https://collections.library.yale.edu/catalog/10666948.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 135, slide 22"])(1934)[Typed letter to Marinetti from Sindacato Giornalisti di Roma, dated 20 settembre 1934, asking him to fill out a questionaire about his journalistic capacities. [10722-1]]. https://collections.library.yale.edu/catalog/10666948.