MLA

Marinetti, F. T., 1876-1944. Two page letter sent to “Caro Marinetti” by Lorenzo [Ruppi] about a young futurist. From Sindacato Fascista autori e scrittori per l'Emilia-Romagna, Bologna, 21 jan 1941. [9941-1]. box 125, slide 41. 1941. https://collections.library.yale.edu/catalog/10665734.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 125, slide 41"])(1941)[Two page letter sent to “Caro Marinetti” by Lorenzo [Ruppi] about a young futurist. From Sindacato Fascista autori e scrittori per l'Emilia-Romagna, Bologna, 21 jan 1941. [9941-1]]. https://collections.library.yale.edu/catalog/10665734.