Letter from W. E. B. Du Bois to unidentified correspondent

Chicago citation style
Du Bois, W. E. B. (William Edward Burghardt), 1868-1963. Letter from W. E. B. Du Bois to unidentified correspondent. 1908-05-21. Retrieved from the Digital Public Library of America, http://credo.library.umass.edu/view/full/mums312-b003-i315. (Accessed December 13, 2018.)
APA citation style
Du Bois, W. E. B. (William Edward Burghardt), 1868-1963, (1908-05-21) Letter from W. E. B. Du Bois to unidentified correspondent. Retrieved from the Digital Public Library of America, http://credo.library.umass.edu/view/full/mums312-b003-i315
MLA citation style
Du Bois, W. E. B. (William Edward Burghardt), 1868-1963. Retrieved from the Digital Public Library of America <http://credo.library.umass.edu/view/full/mums312-b003-i315>.
Note: These citations are programmatically generated and may be incomplete.