MLA

Marinetti, F. T., 1876-1944. [Filippo Tomasso Marinetti?]. “Futurismus und Passeismus.” Neue Freie Press, 25 Aug 1921. In German. [2723-1]-[2724-1]. box 35, slide 23-24. 1921. https://collections.library.yale.edu/catalog/10652795.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 35, slide 23-24"])(1921)[[Filippo Tomasso Marinetti?]. “Futurismus und Passeismus.” Neue Freie Press, 25 Aug 1921. In German. [2723-1]-[2724-1]]. https://collections.library.yale.edu/catalog/10652795.