MLA

Marinetti, F. T., 1876-1944. Anonymous. “De Don Segundo Sombra por Ricardo Guiraldes.” Martin Fierro, 1926. [4294-1]. box 54, slide 74. 1926. https://collections.library.yale.edu/catalog/10655553.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 54, slide 74"])(1926)[Anonymous. “De Don Segundo Sombra por Ricardo Guiraldes.” Martin Fierro, 1926. [4294-1]]. https://collections.library.yale.edu/catalog/10655553.