MLA

Marinetti, F. T., 1876-1944. Full front page of L'Osservatore Romano, Citta del Vaticano, Sunday July 5, 1931. [6735-1]. box 85, slide 35. 1931. https://collections.library.yale.edu/catalog/10659302.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 85, slide 35"])(1931)[Full front page of L'Osservatore Romano, Citta del Vaticano, Sunday July 5, 1931. [6735-1]]. https://collections.library.yale.edu/catalog/10659302.