MLA

Marinetti, F. T., 1876-1944. 2. FTM as an adolescent. Inscribed on verso in several hands: "Marinetti: ragazzo," "figura," and various markings for publication.. Box 49, folder 1937. ca. 1892. https://collections.library.yale.edu/catalog/2008331.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["Box 49, folder 1937"])(ca. 1892)[2. FTM as an adolescent. Inscribed on verso in several hands: "Marinetti: ragazzo," "figura," and various markings for publication.]. https://collections.library.yale.edu/catalog/2008331.