MLA

Marinetti, F. T., 1876-1944. Giacomo Giardina. “Poesie di G. Giardina a F.T. Marinetti.” No source, [1933]. [5670-1]. box 72, slide 10. 1993. https://collections.library.yale.edu/catalog/10657623.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 72, slide 10"])(1993)[Giacomo Giardina. “Poesie di G. Giardina a F.T. Marinetti.” No source, [1933]. [5670-1]]. https://collections.library.yale.edu/catalog/10657623.