MLA

Van Vechten, Carl, 1880-1964. Savage, Augusta. Box 104, folder 1881. 1938 July 9. https://collections.library.yale.edu/catalog/2027831.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 104, folder 1881"])(1938 July 9)[Savage, Augusta]. https://collections.library.yale.edu/catalog/2027831.