MLA

Marinetti, F. T., 1876-1944. n.d. ecco le bozze di ritorno, corrette... 3 p.; 1912 Dec 30 2 p.; 1915 Feb 19 Postcard. Box 11, folder 552. 1898-1970. https://collections.library.yale.edu/catalog/10592595.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["Box 11, folder 552"])(1898-1970)[n.d. ecco le bozze di ritorno, corrette... 3 p.; 1912 Dec 30 2 p.; 1915 Feb 19 Postcard]. https://collections.library.yale.edu/catalog/10592595.