MLA

Johnson, James Weldon, 1871-1938. James Weldon Johnson's cabin, "Five Acres," Great Barrington, Massachusetts. Box 110, folder 974. 1939. https://collections.library.yale.edu/catalog/10000218.

APA, 6th edition

Johnson, James Weldon, 1871-1938. (["Box 110, folder 974"])(1939)[James Weldon Johnson's cabin, "Five Acres," Great Barrington, Massachusetts]. https://collections.library.yale.edu/catalog/10000218.