MLA

Pound, Ezra, 1885-1972. Davies, Ingrid. Box 12, folder 533-534. 1956-64. https://collections.library.yale.edu/catalog/17122546.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 12, folder 533-534"])(1956-64)[Davies, Ingrid]. https://collections.library.yale.edu/catalog/17122546.