MLA

Marinetti, F. T., 1876-1944. Nineteen clippings related to the celebration of “Il comizio fascista” on November 11, 1919. [776-1]. box 10, slide 56. 1919. https://collections.library.yale.edu/catalog/10649472.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 10, slide 56"])(1919)[Nineteen clippings related to the celebration of “Il comizio fascista” on November 11, 1919. [776-1]]. https://collections.library.yale.edu/catalog/10649472.