56. Dolina Messina. FTM and three other men before a hut.
MLA
Marinetti, F. T., 1876-1944. 56. Dolina Messina. FTM and three other men before a hut.. Box 49, folder 1939. 1917 Sep. https://collections.library.yale.edu/catalog/2008616.
APA, 6th edition
Marinetti, F. T., 1876-1944. (["Box 49, folder 1939"])(1917 Sep)[56. Dolina Messina. FTM and three other men before a hut.]. https://collections.library.yale.edu/catalog/2008616.