MLA

Pound, Ezra, 1885-1972. "F" general. Box 16, folder 696-698. 1930-63. https://collections.library.yale.edu/catalog/33408907.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 16, folder 696-698"])(1930-63)["F" general]. https://collections.library.yale.edu/catalog/33408907.