MLA

Pound, Ezra, 1885-1972. Crisis in the Book Trade: typescript. Box 95, folder 3983. [1934]. https://collections.library.yale.edu/catalog/17122722.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 95, folder 3983"])([1934])[Crisis in the Book Trade: typescript]. https://collections.library.yale.edu/catalog/17122722.