MLA

Marinetti, F. T., 1876-1944. Anonymous. “Guillaume Apollinaire versei.” Ujsag, Vasarnap, Feb 1926. In Hungarian. [4171-1]. box 53, slide 31. 1926. https://collections.library.yale.edu/catalog/10655342.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 53, slide 31"])(1926)[Anonymous. “Guillaume Apollinaire versei.” Ujsag, Vasarnap, Feb 1926. In Hungarian. [4171-1]]. https://collections.library.yale.edu/catalog/10655342.