MLA

Van Vechten, Carl, 1880-1964. Balmain, Pierre, creating impromptu dresses on Ruth Ford. Box 334 | Folder 4178. 1947 November 9. https://collections.library.yale.edu/catalog/2030263.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 334 | Folder 4178"])(1947 November 9)[Balmain, Pierre, creating impromptu dresses on Ruth Ford]. https://collections.library.yale.edu/catalog/2030263.