Cite

76. Duplicate of n. 75, made into a postcard.

MLA

Marinetti, F. T., 1876-1944. 76. Duplicate of n. 75, made into a postcard.. Box 49, folder 1941. August 1925. https://collections.library.yale.edu/catalog/2008635.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["Box 49, folder 1941"])(August 1925)[76. Duplicate of n. 75, made into a postcard.]. https://collections.library.yale.edu/catalog/2008635.