MLA

Van Vechten, Carl, 1880-1964. Victor, Sarah. Box 107 | Folder 1946. 1933 May 12. https://collections.library.yale.edu/catalog/2028259.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 107 | Folder 1946"])(1933 May 12)[Victor, Sarah]. https://collections.library.yale.edu/catalog/2028259.