MLA

Johnson, James Weldon, 1871-1938. Draft, typescript. Box 76, folder 503. 1938 April 5. https://collections.library.yale.edu/catalog/16748057.

APA, 6th edition

Johnson, James Weldon, 1871-1938. (["Box 76, folder 503"])(1938 April 5)[Draft, typescript]. https://collections.library.yale.edu/catalog/16748057.