Cite

63. Turin?. Duplicate of n. 62, made into a postcard.

MLA

Marinetti, F. T., 1876-1944. 63. Turin?. Duplicate of n. 62, made into a postcard.. Box 49, folder 1940. ca. 1920. https://collections.library.yale.edu/catalog/2008624.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["Box 49, folder 1940"])(ca. 1920)[63. Turin?. Duplicate of n. 62, made into a postcard.]. https://collections.library.yale.edu/catalog/2008624.