MLA

Van Vechten, Carl, 1880-1964. Andrews, Ann. Box 332, folder 4128. 1932 October 26. https://collections.library.yale.edu/catalog/2029405.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 332, folder 4128"])(1932 October 26)[Andrews, Ann]. https://collections.library.yale.edu/catalog/2029405.