MLA

Marinetti, F. T., 1876-1944. 112. FTM speaking to an informal group outdoors while BCM and Jannelli take notes.. Box 49, folder 1942. August 1925. https://collections.library.yale.edu/catalog/2008659.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["Box 49, folder 1942"])(August 1925)[112. FTM speaking to an informal group outdoors while BCM and Jannelli take notes.]. https://collections.library.yale.edu/catalog/2008659.