MLA

Marinetti, F. T., 1876-1944. Announces representation of U. Boccioni. "Genjusz I Kultura." Teatr Polski. Pomerania, 23 Gtidnia, 1919. [1422-1]. box 19, slide 2. 1919. https://collections.library.yale.edu/catalog/10650633.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 19, slide 2"])(1919)[Announces representation of U. Boccioni. "Genjusz I Kultura." Teatr Polski. Pomerania, 23 Gtidnia, 1919. [1422-1]]. https://collections.library.yale.edu/catalog/10650633.