1908 Mar 17 3 p.; 1908 Mar 28 2 p.; 1908 Aug 11 2 p.; 1909 Nov 8 2 p.
MLA
Marinetti, F. T., 1876-1944. 1908 Mar 17 3 p.; 1908 Mar 28 2 p.; 1908 Aug 11 2 p.; 1909 Nov 8 2 p.. Box 17, folder 1113. 1898-1970. https://collections.library.yale.edu/catalog/10597743.
APA, 6th edition
Marinetti, F. T., 1876-1944. (["Box 17, folder 1113"])(1898-1970)[1908 Mar 17 3 p.; 1908 Mar 28 2 p.; 1908 Aug 11 2 p.; 1909 Nov 8 2 p.]. https://collections.library.yale.edu/catalog/10597743.