MLA

Marinetti, F. T., 1876-1944. Pages from a catalog. With poetic text in dialectal Italian about Futurism. No source. [04850-1]. box 61, slide 70. no date. https://collections.library.yale.edu/catalog/10656381.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 61, slide 70"])(no date)[Pages from a catalog. With poetic text in dialectal Italian about Futurism. No source. [04850-1]]. https://collections.library.yale.edu/catalog/10656381.