Letter from Robert to unidentified correspondent

Chicago citation style
Letter from Robert to unidentified correspondent. 1925. Retrieved from the Digital Public Library of America, http://credo.library.umass.edu/view/full/mums312-b157-i251. (Accessed December 10, 2018.)
APA citation style
(1925) Letter from Robert to unidentified correspondent. Retrieved from the Digital Public Library of America, http://credo.library.umass.edu/view/full/mums312-b157-i251
MLA citation style
Retrieved from the Digital Public Library of America <http://credo.library.umass.edu/view/full/mums312-b157-i251>.
Note: These citations are programmatically generated and may be incomplete.