MLA

Stein, Gertrude, 1874-1946. Manuscript notebooks. Box 77, folder 1419-1422. [1940]. https://collections.library.yale.edu/catalog/2064365.

APA, 6th edition

Stein, Gertrude, 1874-1946. (["Box 77, folder 1419-1422"])([1940])[Manuscript notebooks]. https://collections.library.yale.edu/catalog/2064365.