Cite

1909 Feb 5 3 p.; 1909 Feb 14 8 p.; 1909 Feb 25 3 p.; 1909 Jun 23 3 p.; 1910 Feb 17 2 p.; 1910 Mar 24 Postcard; 1910 Mar 28 Postcard

MLA

Marinetti, F. T., 1876-1944. 1909 Feb 5 3 p.; 1909 Feb 14 8 p.; 1909 Feb 25 3 p.; 1909 Jun 23 3 p.; 1910 Feb 17 2 p.; 1910 Mar 24 Postcard; 1910 Mar 28 Postcard. Box 12, folder 655. 1898-1970. https://collections.library.yale.edu/catalog/2057691.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["Box 12, folder 655"])(1898-1970)[1909 Feb 5 3 p.; 1909 Feb 14 8 p.; 1909 Feb 25 3 p.; 1909 Jun 23 3 p.; 1910 Feb 17 2 p.; 1910 Mar 24 Postcard; 1910 Mar 28 Postcard]. https://collections.library.yale.edu/catalog/2057691.