MLA

Du Bois, W. E. B. (William Edward Burghardt), 1868-1963. Draft chapters, typescript and carbon, corrected. Box 2, folder 43-51. 1914-15. https://collections.library.yale.edu/catalog/2040343.

APA, 6th edition

Du Bois, W. E. B. (William Edward Burghardt), 1868-1963. (["Box 2, folder 43-51"])(1914-15)[Draft chapters, typescript and carbon, corrected]. https://collections.library.yale.edu/catalog/2040343.