MLA

Du Bois, W. E. B. (William Edward Burghardt), 1868-1963. Mimeograph, with revisions. Box 5, folder 110. 1947. https://collections.library.yale.edu/catalog/2040346.

APA, 6th edition

Du Bois, W. E. B. (William Edward Burghardt), 1868-1963. (["Box 5, folder 110"])(1947)[Mimeograph, with revisions]. https://collections.library.yale.edu/catalog/2040346.