MLA

Pound, Ezra, 1885-1972. "Alliance": typescript. Box 128, folder 5316. [1940] Aug 5. https://collections.library.yale.edu/catalog/10034689.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 128, folder 5316"])([1940] Aug 5)["Alliance": typescript]. https://collections.library.yale.edu/catalog/10034689.