MLA

Marinetti, F. T., 1876-1944. Anton Giulio Bragaglia. “Sport e teatro di massa.” No source, [1935-6]. [7782-1]. box 98, slide 42. 1935. https://collections.library.yale.edu/catalog/10661226.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 98, slide 42"])(1935)[Anton Giulio Bragaglia. “Sport e teatro di massa.” No source, [1935-6]. [7782-1]]. https://collections.library.yale.edu/catalog/10661226.