MLA

Cahun, Claude, 1894-1954. Correspondence and other papers. Box 1 | Folder 11. 1943-45. https://collections.library.yale.edu/catalog/15730231.

APA, 6th edition

Cahun, Claude, 1894-1954. (["Box 1 | Folder 11"])(1943-45)[Correspondence and other papers]. https://collections.library.yale.edu/catalog/15730231.