Letter from Mark H. McCormack to Keith Mackenzie

Chicago citation style
McCormack, Mark H. Letter from Mark H. McCormack to Keith Mackenzie. 1977-05-23. Retrieved from the Digital Public Library of America, http://credo.library.umass.edu/view/full/mums700-b0004-f022-i109. (Accessed December 19, 2018.)
APA citation style
McCormack, Mark H, (1977-05-23) Letter from Mark H. McCormack to Keith Mackenzie. Retrieved from the Digital Public Library of America, http://credo.library.umass.edu/view/full/mums700-b0004-f022-i109
MLA citation style
McCormack, Mark H. Retrieved from the Digital Public Library of America <http://credo.library.umass.edu/view/full/mums700-b0004-f022-i109>.
Note: These citations are programmatically generated and may be incomplete.