MLA

Marinetti, F. T., 1876-1944. Robert Randau. "Lettres de la Brousse: notes sur le Futurisme." La Phalange. [00124-1]. box 2, slide 44. no date. https://collections.library.yale.edu/catalog/10648348.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 2, slide 44"])(no date)[Robert Randau. "Lettres de la Brousse: notes sur le Futurisme." La Phalange. [00124-1]]. https://collections.library.yale.edu/catalog/10648348.