MLA

Stein, Gertrude, 1874-1946. About Gertrude Stein. Box 144, folder 3354-3362. 1934-35. https://collections.library.yale.edu/catalog/10514368.

APA, 6th edition

Stein, Gertrude, 1874-1946. (["Box 144, folder 3354-3362"])(1934-35)[About Gertrude Stein]. https://collections.library.yale.edu/catalog/10514368.