MLA

Richardson, Dorothy M. (Dorothy Miller), 1873-1957. AUTHORS & READERS: autograph MS drafts 3 p.. Box 8, folder 139. n.d.. https://collections.library.yale.edu/catalog/10676221.

APA, 6th edition

Richardson, Dorothy M. (Dorothy Miller), 1873-1957. (["Box 8, folder 139"])(n.d.)[AUTHORS & READERS: autograph MS drafts 3 p.]. https://collections.library.yale.edu/catalog/10676221.