MLA

Van Vechten, Carl, 1880-1964. Fiske, Dwight. Box 348 | Folder 4593. 1933 March 6. https://collections.library.yale.edu/catalog/2034561.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 348 | Folder 4593"])(1933 March 6)[Fiske, Dwight]. https://collections.library.yale.edu/catalog/2034561.