MLA

Stein, Gertrude, 1874-1946. Typescript. Box 32, folder 668. n.d.. https://collections.library.yale.edu/catalog/17105706.

APA, 6th edition

Stein, Gertrude, 1874-1946. (["Box 32, folder 668"])(n.d.)[Typescript]. https://collections.library.yale.edu/catalog/17105706.