MLA

Jordan, Viola Baxter, 1887-1973. Williams, Florence. Box 3, folder 108. 1913-18, n.d.. https://collections.library.yale.edu/catalog/2038230.

APA, 6th edition

Jordan, Viola Baxter, 1887-1973. (["Box 3, folder 108"])(1913-18, n.d.)[Williams, Florence]. https://collections.library.yale.edu/catalog/2038230.