MLA

Bates, Charles Francis, 1862-1944. Portrait. Box 23, folder 340. n.d.. https://collections.library.yale.edu/catalog/2005573.

APA, 6th edition

Bates, Charles Francis, 1862-1944. (["Box 23, folder 340"])(n.d.)[Portrait]. https://collections.library.yale.edu/catalog/2005573.