MLA

Van Vechten, Carl, 1880-1964. Hurston, Zora Neale. Box 93 | Folder 1637. 1935 April 3. https://collections.library.yale.edu/catalog/2001913.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 93 | Folder 1637"])(1935 April 3)[Hurston, Zora Neale]. https://collections.library.yale.edu/catalog/2001913.