MLA

Van Vechten, Carl, 1880-1964. Justema, William. Box 355 | Folder 4811. 1937 March 4. https://collections.library.yale.edu/catalog/2054414.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 355 | Folder 4811"])(1937 March 4)[Justema, William]. https://collections.library.yale.edu/catalog/2054414.