Cite

Anonymous. “Marinetti.” No source, [1930]. In Polish. [6392-1]

MLA

Marinetti, F. T., 1876-1944. Anonymous. “Marinetti.” No source, [1930]. In Polish. [6392-1]. box 81, slide 12. 1930. https://collections.library.yale.edu/catalog/10658735.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 81, slide 12"])(1930)[Anonymous. “Marinetti.” No source, [1930]. In Polish. [6392-1]]. https://collections.library.yale.edu/catalog/10658735.