MLA

Marinetti, F. T., 1876-1944. Autograph manuscript notes for the Poema africano, with many corrections. 30 p., unnumbered, varying sizes. Box 32, folder 1491. 1895-1944. https://collections.library.yale.edu/catalog/17471746.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["Box 32, folder 1491"])(1895-1944)[Autograph manuscript notes for the Poema africano, with many corrections. 30 p., unnumbered, varying sizes]. https://collections.library.yale.edu/catalog/17471746.