MLA

Marinetti, F. T., 1876-1944. Unsigned and untitled article. The London Mercury, February 1920. Deals with Blast and the Avant-garde. [1526-1]. box 20, slide 26. 1920. https://collections.library.yale.edu/catalog/10650723.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 20, slide 26"])(1920)[Unsigned and untitled article. The London Mercury, February 1920. Deals with Blast and the Avant-garde. [1526-1]]. https://collections.library.yale.edu/catalog/10650723.