MLA

Pound, Ezra, 1885-1972. Typescript. Box 70, folder 3106. 1917 Mar-Aug. https://collections.library.yale.edu/catalog/16032484.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 70, folder 3106"])(1917 Mar-Aug)[Typescript]. https://collections.library.yale.edu/catalog/16032484.