MLA

Van Vechten, Carl, 1880-1964. Troutman, Ivy. Box 378 | Folder 5522. 1935 December 29. https://collections.library.yale.edu/catalog/10563577.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 378 | Folder 5522"])(1935 December 29)[Troutman, Ivy]. https://collections.library.yale.edu/catalog/10563577.