Anniversary of Martin Luther King, Jr's death

Chicago citation style
Anniversary of Martin Luther King, Jr's death. 1969-04-05. Retrieved from the Digital Public Library of America, http://content.mpl.org/cdm/ref/collection/HstoricPho/id/6309. (Accessed February 21, 2020.)
APA citation style
(1969-04-05) Anniversary of Martin Luther King, Jr's death. Retrieved from the Digital Public Library of America, http://content.mpl.org/cdm/ref/collection/HstoricPho/id/6309
MLA citation style
Retrieved from the Digital Public Library of America <http://content.mpl.org/cdm/ref/collection/HstoricPho/id/6309>.
Note: These citations are programmatically generated and may be incomplete.