MLA

Jordan, Viola Baxter, 1887-1973. Pound, Ezra. Box 2, folder 79-80. 1946 Jan-Jul. https://collections.library.yale.edu/catalog/2037911.

APA, 6th edition

Jordan, Viola Baxter, 1887-1973. (["Box 2, folder 79-80"])(1946 Jan-Jul)[Pound, Ezra]. https://collections.library.yale.edu/catalog/2037911.