MLA

Van Vechten, Carl, 1880-1964. Perényi, Eleanor, and Peter Perényi. Box 370 | Folder 5264. 1946 January 5. https://collections.library.yale.edu/catalog/10000629.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 370 | Folder 5264"])(1946 January 5)[Perényi, Eleanor, and Peter Perényi]. https://collections.library.yale.edu/catalog/10000629.