MLA

Van Vechten, Carl, 1880-1964. Curtiss, Mina Kirstein. Box 342, folder 4435. 1933 February 3. https://collections.library.yale.edu/catalog/2032346.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 342, folder 4435"])(1933 February 3)[Curtiss, Mina Kirstein]. https://collections.library.yale.edu/catalog/2032346.