H.D.
MLA
Jordan, Viola Baxter, 1887-1973. H.D.. Box 1, folder 43. [1950]. https://collections.library.yale.edu/catalog/2037303.
APA, 6th edition
Jordan, Viola Baxter, 1887-1973. (["Box 1, folder 43"])([1950])[H.D.]. https://collections.library.yale.edu/catalog/2037303.