MLA

Pound, Ezra, 1885-1972. Partito Nazionale Fascista. Box 39, folder 1661. 1936, 41-43. https://collections.library.yale.edu/catalog/32159545.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 39, folder 1661"])(1936, 41-43)[Partito Nazionale Fascista]. https://collections.library.yale.edu/catalog/32159545.