MLA

Kaufman, Boris (1906-1980). Vigo, Jean. Box 14, folder 283. [1935?] Sep. https://collections.library.yale.edu/catalog/16591745.

APA, 6th edition

Kaufman, Boris (1906-1980). (["Box 14, folder 283"])([1935?] Sep)[Vigo, Jean]. https://collections.library.yale.edu/catalog/16591745.