MLA

Baldwin, James, 1924-1987. Garin-Painter, Mary. Box 2 | Folder 4. 1956. https://collections.library.yale.edu/catalog/16599364.

APA, 6th edition

Baldwin, James, 1924-1987. (["Box 2 | Folder 4"])(1956)[Garin-Painter, Mary]. https://collections.library.yale.edu/catalog/16599364.