MLA

Pound, Ezra, 1885-1972. Criminals: typescript. Box 95, folder 3981. n.d.. https://collections.library.yale.edu/catalog/17122721.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 95, folder 3981"])(n.d.)[Criminals: typescript]. https://collections.library.yale.edu/catalog/17122721.