MLA

Van Vechten, Carl, 1880-1964. Lucioni, Luigi. Box 362, folder 5008. 1938 December 26. https://collections.library.yale.edu/catalog/2056583.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 362, folder 5008"])(1938 December 26)[Lucioni, Luigi]. https://collections.library.yale.edu/catalog/2056583.