MLA

Pound, Ezra, 1885-1972. No. 31, "As to Victory": typescript. Box 129, folder 5345. 1942 [Sep 2]. https://collections.library.yale.edu/catalog/10034698.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 129, folder 5345"])(1942 [Sep 2])[No. 31, "As to Victory": typescript]. https://collections.library.yale.edu/catalog/10034698.