MLA

Jordan, Viola Baxter, 1887-1973. Bradley, Sculley. Box 1, folder 2. 1948 Apr 22. https://collections.library.yale.edu/catalog/2036296.

APA, 6th edition

Jordan, Viola Baxter, 1887-1973. (["Box 1, folder 2"])(1948 Apr 22)[Bradley, Sculley]. https://collections.library.yale.edu/catalog/2036296.