MLA

Van Vechten, Carl, 1880-1964. Shaffer, Angevine Hayward, Mary Van Vechten Shaffer, and Susan Angevine Shaffer at Cedar Rapids, Iowa. Box 375, folder 5406. 1934 November 9. https://collections.library.yale.edu/catalog/33250176.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 375, folder 5406"])(1934 November 9)[Shaffer, Angevine Hayward, Mary Van Vechten Shaffer, and Susan Angevine Shaffer at Cedar Rapids, Iowa]. https://collections.library.yale.edu/catalog/33250176.