MLA

Stein, Gertrude, 1874-1946. Basket II. art, folder 4254. n.d.. https://collections.library.yale.edu/catalog/2068674.

APA, 6th edition

Stein, Gertrude, 1874-1946. (["art, folder 4254"])(n.d.)[Basket II]. https://collections.library.yale.edu/catalog/2068674.