SUNDAY: typescript (carbon) 6 p.
MLA
Richardson, Dorothy M. (Dorothy Miller), 1873-1957. SUNDAY: typescript (carbon) 6 p.. Box 8, folder 176. n.d.. https://collections.library.yale.edu/catalog/16495643.
APA, 6th edition
Richardson, Dorothy M. (Dorothy Miller), 1873-1957. (["Box 8, folder 176"])(n.d.)[SUNDAY: typescript (carbon) 6 p.]. https://collections.library.yale.edu/catalog/16495643.