MLA

Pound, Ezra, 1885-1972. Notes, autograph and typescript. Box 72, folder 3226. 1903 1975. https://collections.library.yale.edu/catalog/16169365.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 72, folder 3226"])(1903 1975)[Notes, autograph and typescript]. https://collections.library.yale.edu/catalog/16169365.