MLA

Johnson, James Weldon, 1871-1938. James Weldon Johnson Dinner 1906. Box 11, folder 243. 1906. https://collections.library.yale.edu/catalog/16747994.

APA, 6th edition

Johnson, James Weldon, 1871-1938. (["Box 11, folder 243"])(1906)[James Weldon Johnson Dinner 1906]. https://collections.library.yale.edu/catalog/16747994.