MLA

Jordan, Viola Baxter, 1887-1973. Pound, Ezra. Box 2, folder 71. 1937. https://collections.library.yale.edu/catalog/2037991.

APA, 6th edition

Jordan, Viola Baxter, 1887-1973. (["Box 2, folder 71"])(1937)[Pound, Ezra]. https://collections.library.yale.edu/catalog/2037991.