"Notes for Project : Letter to My Younger Brother"
MLA
Baldwin, James, 1924-1987. "Notes for Project : Letter to My Younger Brother". Box 1, folder GROUP 4, F-3. undated. https://collections.library.yale.edu/catalog/17246521.
APA, 6th edition
Baldwin, James, 1924-1987. (["Box 1, folder GROUP 4, F-3"])(undated)["Notes for Project : Letter to My Younger Brother"]. https://collections.library.yale.edu/catalog/17246521.