MLA

Stettheimer, Florine, 1871-1944. Bolm, Adolphe. Box 1, folder 11. 1935, 1951, n.d.. https://collections.library.yale.edu/catalog/32267625.

APA, 6th edition

Stettheimer, Florine, 1871-1944. (["Box 1, folder 11"])(1935, 1951, n.d.)[Bolm, Adolphe]. https://collections.library.yale.edu/catalog/32267625.