MLA

Richardson, Dorothy M. (Dorothy Miller), 1873-1957. GRUYERES: typescript 6 p.. Box 8, folder 152. n.d.. https://collections.library.yale.edu/catalog/16495630.

APA, 6th edition

Richardson, Dorothy M. (Dorothy Miller), 1873-1957. (["Box 8, folder 152"])(n.d.)[GRUYERES: typescript 6 p.]. https://collections.library.yale.edu/catalog/16495630.