MLA

Jordan, Viola Baxter, 1887-1973. Pound, Ezra. Box 2, folder 78. 1945. https://collections.library.yale.edu/catalog/2037905.

APA, 6th edition

Jordan, Viola Baxter, 1887-1973. (["Box 2, folder 78"])(1945)[Pound, Ezra]. https://collections.library.yale.edu/catalog/2037905.