MLA

Marinetti, F. T., 1876-1944. Two pages of a program of Futurist music with Malipiero, Pratella, Tedesco , etc., Roma, [1935]. [7790-1]-[7791-1]. box 98, slide 50-51. 1935. https://collections.library.yale.edu/catalog/10661249.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 98, slide 50-51"])(1935)[Two pages of a program of Futurist music with Malipiero, Pratella, Tedesco , etc., Roma, [1935]. [7790-1]-[7791-1]]. https://collections.library.yale.edu/catalog/10661249.