MLA

Wescott, Glenway, 1901-1987. Caetani, Marguerite. Box 42, folder 567. 1952 Dec 13. https://collections.library.yale.edu/catalog/17065002.

APA, 6th edition

Wescott, Glenway, 1901-1987. (["Box 42, folder 567"])(1952 Dec 13)[Caetani, Marguerite]. https://collections.library.yale.edu/catalog/17065002.