MLA

Crane, Hart, 1899-1932. Brenner, Anita. Box 12, folder 368. 1931-32, n.d.. https://collections.library.yale.edu/catalog/17155298.

APA, 6th edition

Crane, Hart, 1899-1932. (["Box 12, folder 368"])(1931-32, n.d.)[Brenner, Anita]. https://collections.library.yale.edu/catalog/17155298.