MLA

Du Bois, W. E. B. (William Edward Burghardt), 1868-1963. Typescript, corrected. Box 3, folder 69. 1946. https://collections.library.yale.edu/catalog/2040350.

APA, 6th edition

Du Bois, W. E. B. (William Edward Burghardt), 1868-1963. (["Box 3, folder 69"])(1946)[Typescript, corrected]. https://collections.library.yale.edu/catalog/2040350.